Found 26 papers in cond-mat Substitutionally doped transition metal dichalcogenides (TMDs) are the next
step towards realizing TMD-based field effect transistors, sensors, and quantum
photonic devices. Here, we report on the influence of Re concentration on
charge doping and defect formation in MoS2 monolayers grown by metal-organic
chemical vapor deposition. Re-MoS2 films can exhibit reduced sulfur-site
defects; however, as the Re concentration approaches 2 atom%, there is
significant clustering of Re in the MoS2. Ab Initio calculations indicate that
the transition from isolated Re atoms to Re clusters increases the ionization
energy of Re dopants, thereby reducing Re-doping efficacy. Using
photoluminescence spectroscopy, we show that Re dopant clustering creates
defect states that trap photogenerated excitons within the MoS2 lattice. These
results provide insight into how the local concentration of metal dopants
affect carrier density, defect formation, and exciton recombination in TMDs,
which can aid the development of future TMD-based devices with improved
electronic and photonic properties.
Topological invariants are fundamental characteristics reflecting global
properties of quantum systems, yet their exploration has predominantly been
limited to the static (DC) transport and transverse (Hall) channel. In this
work, we extend the spectral sum rules for frequency-resolved electric
conductivity $\sigma (\omega)$ in topological systems, and show that the sum
rule for the longitudinal channel is expressed through topological and
quantum-geometric invariants. We find that for dispersionless (flat) Chern
bands, the rule is expressed as, $ \int_{-\infty}^{+\infty} d\omega \,
\text{Re}(\sigma_{xx} + \sigma_{yy}) = C \Delta e^2$, where $C$ is the Chern
number, $\Delta$ the topological gap, and $e$ the electric charge. In scenarios
involving dispersive Chern bands, the rule is defined by the invariant of the
quantum metric, and Luttinger invariant, $\int_{-\infty}^{+\infty} d\omega \,
\text{Re}(\sigma_{xx} + \sigma_{yy}) = 2 \pi e^2 \Delta \sum_{\boldsymbol{k}}
\text{Tr} \, \mathcal{G}_{ij}(\boldsymbol{k})$+(Luttinger invariant), where
$\text{Tr} \, \mathcal {G}_{ij}$ is invariant of the Fubini-Study metric
(defining spread of Wannier orbitals). We further discuss the physical role of
topological and quantum-geometric invariants in spectral sum rules. Our
approach is adaptable across varied topologies and system dimensionalities.
We provide a generalization of the Symmetry Topological Field Theory (SymTFT)
framework to characterize phase transitions and gapless phases with categorical
symmetries. The central tool is the club sandwich, which extends the SymTFT
setup to include an interface between two topological orders: there is a
symmetry boundary, which is gapped, and a physical boundary that may be
gapless, but in addition, there is also a gapped interface in the middle. The
club sandwich generalizes so-called Kennedy-Tasaki (KT) transformations.
Building on the results in [1, 2] on gapped phases with categorical symmetries,
we construct gapless theories describing phase transitions with non-invertible
symmetries by applying suitable KT transformations on known phase transitions
provided by the critical Ising model and the 3-state Potts model. We also
describe in detail the order parameters in these gapless theories
characterizing the phase transitions, which are generally mixtures of
conventional and string-type order parameters mixed together by the action of
categorical symmetries. Additionally, removing the physical boundary from the
club sandwiches results in club quiches, which characterize all possible gapped
boundary phases with (possibly non-invertible) symmetries that can arise on the
boundary of a bulk gapped phase. We also provide a mathematical
characterization of gapped boundary phases with symmetries as pivotal tensor
functors whose targets are pivotal multi-fusion categories.
Skyrmions are particle-like vortices of magnetization with non-trivial
topology, which are usually stabilized by Dzyaloshinskii-Moriya interactions
(DMI) in noncentrosymmetric bulk materials. Exceptions are centrosymmetric Gd-
and Eu-based skyrmion-lattice (SkL) hosts with net zero DMI, where both the
dominant SkL stabilization mechanisms and ground-state magnetic properties
remain controversial. In this Letter we use muon spectroscopy ($\mu$SR) to
address these by investigating both static and dynamic spin properties of the
most-studied centrosymmetric SkL host, Gd$_2$PdSi$_3$. We find that spin
fluctuations in the non-coplanar SkL phase are highly anisotropic, implying
that spin anisotropy plays a prominent role in stabilizing this phase.
Intriguingly, we also observe strongly-anisotropic spin fluctuations in the
ground-state (IC-1) incommensurate magnetic phase of the material, indicating
that it is a complex multi-$q$ magnetic structure. On the other hand, the
higher-field coplanar IC-2 phase is found to be single-$q$ with mostly
isotropic spin dynamics.
We study the non-linear dynamics and failure statistics of a coupled-field
fatigue damage evolution model. We develop a methodology to derive averaged
damage evolution rate laws from such models. We show that such rate laws reduce
life-cycle simulation times by orders of magnitude and permit dynamical systems
analysis of long-time behavior, including failure time statistics. We use the
averaged damage rate laws to study 1 DOF and 2 DOF damage evolution models. We
identify parameter regimes in which the systems behave like a brittle material
and show that the relative variability for failure times is high for such
cases. We also use the averaged rate laws to construct damage evolution phase
portraits for the 2 DOF system and use insights derived from them to understand
failure time and location statistics. We show that, for brittle materials, as
the relative variability in failure time increases, the variability in failure
location decreases.
The Yao-Lee (YL) model is an example of exactly solvable spin-orbital models
that are generalizations of the original Kitaev honeycomb model with extra
local orbital degrees of freedom. Similar to the Kitaev model, both spin and
orbital degrees of freedom are effectively represented using sets of
three-flavored Majorana fermions. The YL model exhibits a quantum spin liquid
ground state with gapped and immobile Z$_2$ fluxes and three-fold degenerate
itinerant Majorana fermions. Our work demonstrated that by introducing
different time-reversal symmetry (TRS) breaking fields one can split the
degeneracy of Majorana fermions and close the gap for some of the bands, thus
changing its topology. We calculated a comprehensive topological phase diagram
for the YL model by considering various combinations of TRS breaking fields.
This investigation revealed the emergence of distinct topological regions, each
separated by nodal lines, signifying an evolution in the model's topological
properties. We also investigated the impact of vacancies in the system. Our
findings revealed that while vacancies modify the low-energy spectrum of the
model, their presence has a limited impact on the topological properties of the
model, at least for small enough concentrations.
The Escherichia coli chemoreceptors form an extensive array that achieves
cooperative and adaptive sensing of extracellular signals. The receptors
control the activity of histidine kinase CheA, which drives a non-equilibrium
phosphorylation-dephosphorylation reaction cycle for response regulator CheY.
Recent single-cell FRET measurements revealed that kinase activity of the array
spontaneously switches between active and inactive states, with asymmetric
switching times that signify time-reversal symmetry breaking in the underlying
dynamics. Here, we show that the asymmetric switching dynamics can be explained
by a non-equilibrium lattice model, which considers both the dissipative
reaction cycles of individual core units and the coupling between neighboring
units. The model reveals that large dissipation and near-critical coupling are
required to explain the observed switching dynamics. Microscopically, the
switching time asymmetry originates from irreversible transition paths. The
model shows that strong dissipation enables sensitive and rapid signaling
response by relieving the speed-sensitivity trade-off, which can be tested by
future single-cell experiments. Overall, our model provides a general framework
for studying biological complexes composed of coupled subunits that are
individually driven by dissipative cycles and the rich non-equilibrium physics
within.
This investigation covers the effects of variable exchange interactions on
the spin dynamics of the zig-zag honeycomb lattice. Using a Holstein-Primakoff
expansion of the Heisenberg Hamiltonian with easy-axis anisotropy, we
characterize the effects of multiple nearest-neighbor and next-nearest-neighbor
interactions with asymmetry within the context of a frustrated and
non-frustrated zig-zag magnetic configuration. Furthermore, we compare to the
known inelastic neutron scattering data for the proximate quantum spin liquid
$\alpha$-RuCl$_3$, and we provide insight into the evolution of the spin
dynamics, showing that the Heisenberg interaction dominates the majority of the
spin excitation behavior. By analyzing the frustrated system with multiple
interactions, direction-dependent Dirac nodes present themselves, and we can
demonstrate that a standard Heisenberg model can accurately describe the
observed magnon spectra.
Despite widespread interest in the phase-change applications of vanadium
dioxide (VO$_2$), the fabrication of high-quality VO$_2$ thin films with
elevated transition temperatures (TIMT) and high Insulator-Metal-Transition
resistance switching still remains a challenge. This study introduces a
two-step atmospheric oxidation approach to fabricate bilayer VO$_{2-x}$/VO$_2$
films on a c-plane sapphire substrate. To quantify the impact of the VO$_2$
buffer layer, a single-layer VO$_2$ film of the same thickness was also
fabricated. The bilayer VO$_{2-x}$/VO$_2$ films wherein the top VO$_{2-x}$ film
was under-oxidized demonstrated an elevation in TIMT reaching ~97 $^\circ$C,
one of the highest reported to date for VO$_2$ films and is achieved in a
doping-free manner. Our results also reveal a one-order increase in resistance
switching, with the optimum bilayer VO$_2$/VO$_2$ film exhibiting ~3.6 orders
of switching from 25 $^\circ$C to 110 $^\circ$C, compared to the optimum
single-layer VO$_2$ reference film. This is accompanied by a one-order decrease
in the on-state resistance in its metallic phase. The elevation in TIMT,
coupled with increased strain extracted from the XRD characterization of the
bilayer film, suggests the possibility of compressive strain along the c-axis.
These VO$_{2-x}$/VO$_2$ films also demonstrate a significant change in the
slope of their resistance vs temperature curves contrary to the conventional
smooth transition. This feature was ascribed to the rutile/monoclinic
quasi-heterostructure formed due to the top VO$_{2-x}$ film having a reduced
TIMT. Our findings carry significant implications for both the lucid
fabrication of VO$_2$ thin film devices as well as the study of phase
transitions in correlated oxides.
Nodal-line semimetals are topological phases where the conduction and the
valence bands cross each other along one-dimensional lines in the Brillouin
zone, which are symmetry protected by either spatial symmetries or
time-reversal symmetry. In particular, nodal lines protected by the combined
$\mathcal{PT}$ symmetry exhibits the parity anomaly of 2D Dirac fermions. In
this Letter, we study the electrochemical transport in a
$\mathcal{PT}$-symmetric Dirac nodal line semimetals by using the semiclassical
Boltzmann equation approach. We derive a general formula for the topological
current that includes both the Berry curvature and the orbital magnetic moment.
We first evaluate the electrochemical current by introducing a small
$\mathcal{PT}$-breaking mass term (which could be induced by inversion-breaking
uniaxial strain, pressure, or an external electric field) and apply it to the
hexagonal pnictide CaAgP. The electrochemical current vanishes in the zero-mass
limit. Introducing a tilting term that does not spoil $\mathcal{PT}$ symmetry
that protects the nodal ring, we obtain a finite electrochemical current in the
zero-mass limit, which can be regarded as a direct consequence of the parity
anomaly. We show that the parity anomaly induced electrochemical transport is
also present at nonzero temperatures.
We present theoretical and experimental studies of superconductivity and low
temperature structural phase boundaries in lithium. We mapped the structural
phase diagram of 6Li and 7Li under hydrostatic conditions between 5 top 55GPa
and within the temperature range of 15 to 75K, observing the FCC-hR1-cI16 phase
transitions. 6Li and 7Li show some differences at the structural boundaries,
with a potential shift of the phase boundaries of 6Li to lower pressures.
Density functional theory calculations and topological analysis of the electron
density elucidates the superconducting properties and interatomic interactions
within these phases of lithium.
Manipulating carrier density through gate effects, both in electrostatic
charge storage and electrochemical intercalation mode, offers powerful control
over material properties, although commonly restricted to ultra-thin films or
van der Waals materials. Here we demonstrate the application of gate-driven
carrier modulation in the microdevice of magnetic Weyl semimetal Co3Sn2S2,
fabricated from a bulk single crystal via focused ion beam (FIB). We discovered
a Li-intercalated phase LixCo3Sn2S2 featuring electron doping exceeding 5*1021
cm-3, resulting in the Fermi energy shift of 200 meV. The carrier density
dependent anomalous Hall conductivity shows fair agreement with density
functional theory (DFT) calculation, which also predicts intercalated Li+ ion
stabilization within the anion layer while maintaining the kagome-lattice
intact. This likely explains the observed rigid band behavior and constant
Curie temperature, contrasting with magnetic site substitution experiments. Our
findings suggest ionic gating on FIB devices broadens the scope of gate-tuning
in quantum materials.
We have studied the topological properties of free standing Sn doped cadmium
chalcogenide (CdSnX, X = S, Se and Te) nanoribbons of varying widths and three
types of edges viz., distorted armchair, normal armchair and normal zigzag
edges. The unsatisfied bonds of X and Sn atoms at the edges cause non-zero
values of the magnetic moment. This introduces an exchange field leading to
inverted band structure. The electronic band structures of distorted armchair
edge nanoribbons also exhibit different types of spin splitting property for
different X atoms due to the different local orbital angular momentum at
specific X atomic site with the inclusion of spin orbit coupling (SOC). The gap
opening at the band crossings near the Fermi level after inclusion of SOC are
mainly due to SOC of Sn atom and are responsible for the electron and hole
pockets making the system topologically exotic. All the distorted edge
nanoribbons show metallic behaviour with non-zero magnetic moments. Amongst CdX
(X = S, Se and Te) nanoribbons, systems containing S atoms exhibit Weyl-like
semi-metallic behavior and not much change with width, that of Se atoms exhibit
Zeeman-type spin splitting and significant change with varying width, whereas
systems containing Te atoms show signature of Rashba spin splitting along with
Zeeman-type spin splitting and moderate change with varying width. The armchair
edge nanoribbons show wide gap semiconducting behaviour. Zeeman-type spin
splitting is seen in the valence band region for systems containing S atoms and
Rashba spin splitting is visible in the conduction band region for systems
containing Se and Te atoms. For zigzag edge nanoribbons, no such signature of
spin splitting is observed although all the nanoribbons acquire very high
magnetic moments.
Janus transition metal dichalcogenides (JTMDs) have attracted much attention
because of their outstanding electronic and optical properties. The additional
out-of-plane dipole in JTMDs can form n- and p-like Ohmic contacts, and this
may be used in device applications such as pin diodes and photovoltaic cells.
In this study, we exploit this property to design n- and p-type
metal-oxide-semiconductor field effect transistors (MOSFETs). First, we use
density-functional theory calculations to study the inherent dipole field
strength in the trilayer JTMD MoSSe. The intrinsic dipole of MoSSe causes band
bending at both the metal/MoSSe and MoSSe/metal interfaces, resulting in
electron and hole accumulation to form n- and p-type Ohmic contact regions. We
incorporate this property into a 2D finite-element-based
Poisson-drift-diffusion solver to perform simulations, on the basis of which we
design complementary MOSFETs. Our results demonstrate that JTMDs can be used to
make n- and p-MOSFETs in the same layer without the need for any extra doping.
The coupling between electron orbital momentum and spin momentum, known as
spin-orbit coupling (SOC), is a fundamental origin of a multitude of
fascinating physical phenomena, especially it holds paramount significance in
the realm of topological materials. In our work, we have predicted the
topological phase in Hg-based chalcopyrite compounds using the first principles
density functional theory. The initial focus was on HgSnN 2 , revealing it to
be a nonmagnetic Weyl semimetal, while HgSnP 2 displayed characteristics of a
strong topological insulator. What makes our work truly unique is that despite
both compounds having the same SOC strength, arises from Hg, they exhibit
distinct topological phases due to the distinct hybridization effect of the
Hg-5d and X-p bands. This finding can address a significant factor, i.e., the
effect of the band hybridization in deriving distinct topological phases,
keeping the symmetry aspect intact. Our results indicate that due to the
presence of band hybridization between the dominant X-np orbitals n=2 and 3 for
X=N and P respectively and a minor contribution from Hg-5d, we can tune the
topological phase by manipulating SOC strength, which equivalently achievable
by chemical substitutions. This investigation stands as a remarkable
illustration of the unique roles that hybridization plays in sculpting the
topological properties of these compounds while simultaneously preserving their
underlying symmetries.
We propose a topological probe for detecting chirality imbalance in time
reversal invariant Weyl and Dirac semimetals via nonlinear Hall response. The
chiral anomaly effect, occurring in parallel electric and magnetic fields,
causes a energy shift between Weyl cones of different chirality, which leads to
chirally asymmetric intra-node relaxation. Due to this asymmetry, nonlinear
Hall currents induced by Berry curvature in different Weyl nodes do not
perfectly compensate. Hence, the net current is determined by the quantized
monopole charge, weighted by the transport relaxation time. We predict that the
current arising from this chiral asymmetry could also be detected in nonlinear
circular dichroism measurements.
A few years ago, a topological quantum phase transition (TQPT) has been found
in Anderson and Kondo 2-channel spin-1 impurity models that include a hard-axis
anisotropy term $DS_z^2$ with $D > 0$. The most remarkable manifestation of the
TQPT is a jump in the spectral density of localized electrons, at the Fermi
level, from very high to very low values as $D$ is increased. If the two
conduction channels are equivalent, the transition takes place at the critical
anisotropy $D_c \sim 2.5\; T_K$, where $T_K$ is the Kondo temperature for
$D=0$. This jump might be important to develop a molecular transistor. The jump
is due to a corresponding one in the Luttinger integral, which has a
topological non-trivial value $\pi/2$ for $D > D_c$. Here, we review the main
results for the spectral density and highlight the significance of the theory
for the interpretation of measurements conducted on magnetic atoms or molecules
on metallic surfaces. In these experiments, where $D$ is held constant, the
energy scale $T_K$ is manipulated by some parameters. The resulting variation
gives rise to a differential conductance $dI/dV$, measured by
scanning-tunneling spectroscopy, which is consistent with a TQPT at an
intermediate value of $T_K$. We also show that the theory can be extended to
integer spin $S>1$ and two-impurity systems. This is also probably true for
half-integer spin and non-equivalent channels in some cases.
Josephson junctions are typically characterized by a single phase difference
across two superconductors. This conventional two-terminal Josephson junction
can be generalized to a multi-terminal device where the Josephson energy
contains terms that result from entanglement of multiple independent phase
variables. It was recently proposed that such multi-terminal couplings should
result in a $\pi$-shifted quartet supercurrent. We show for the first time
experimental signature of this $\pi$-shifted supercurrent, by using a
three-terminal Josephson junction based on selective-area-grown PbTe nanowires.
We further observe conductance steps at zero magnetic field co-existent with
supercurrent in both two- and three-terminal devices, indicating ballistic
superconductivity in the few quantum modes regime. Superconducting transport in
the few-modes regime is a necessary condition for realizing topologically
protected bound states such as Majorana zero modes in one-dimensional nanowires
and Weyl nodes in multi-terminal Josephson junctions.
Learning algorithms based on backpropagation have enabled transformative
technological advances but alternatives based on local energy-based rules offer
benefits in terms of biological plausibility and decentralized training. A
broad class of such local learning rules involve \textit{contrasting} a clamped
configuration with the free, spontaneous behavior of the system. However,
comparisons of clamped and free configurations require explicit memory or
switching between Hebbian and anti-Hebbian modes. Here, we show how a simple
form of implicit non-equilibrium memory in the update dynamics of each
``synapse'' of a network naturally allows for contrastive learning. During
training, free and clamped behaviors are shown in sequence over time using a
sawtooth-like temporal protocol that breaks the symmetry between those two
behaviors when combined with non-equilibrium update dynamics at each synapse.
We show that the needed dynamics is implicit in integral feedback control,
broadening the range of physical and biological systems naturally capable of
contrastive learning. Finally, we show that non-equilibrium dissipation
improves learning quality and determine the Landauer energy cost of contrastive
learning through physical dynamics.
We investigate the possibility of reproducing the continuum physics of 2d
SU(N) gauge theory coupled to a single flavor of massless Dirac fermions using
qubit regularization. The continuum theory is described by N free fermions in
the ultraviolet (UV) and a coset Wess-Zumino-Witten (WZW) model in the infrared
(IR). In this work, we explore how well these features can be reproduced using
the Kogut-Susskind Hamiltonian with a finite-dimensional link Hilbert space and
a generalized Hubbard coupling. Using strong coupling expansions, we show that
our model exhibits a gapped dimer phase and another phase described by a
spin-chain. Furthermore, for N=2, using tensor network methods, we show that
there is a second-order phase transition between these two phases. The critical
theory at the transition can be understood as an SU(2)_1 WZW model, using which
we determine the phase diagram of our model quantitatively. Using the
confinement properties of the model we argue how the UV physics of free
fermions could also emerge, but may require further modifications to our model.
Motivated by attempts to quantum simulate lattice models with continuous
Abelian symmetries using discrete approximations, we study an extended-O(2)
model in two dimensions that differs from the ordinary O(2) model by the
addition of an explicit symmetry breaking term $-h_q\cos(q\varphi)$. Its
coupling $h_q$ allows to smoothly interpolate between the O(2) model ($h_q=0$)
and a $q$-state clock model ($h_q\rightarrow\infty$). In the latter case, a
$q$-state clock model can also be defined for non-integer values of $q$. Thus,
such a limit can also be considered as an analytic continuation of an ordinary
$q$-state clock model to noninteger $q$. In previous work, we established the
phase diagram of the model in the infinite coupling limit
($h_q\rightarrow\infty$). We showed that for non-integer $q$, there is a
second-order phase transition at low temperature and a crossover at high
temperature. In this work, we establish the phase diagram at finite values of
the coupling using Monte Carlo and tensor methods. We show that for non-integer
$q$, the second-order phase transition at low temperature and crossover at high
temperature persist to finite coupling. For integer $q=2,3,4$, we know there is
a second-order phase transition at infinite coupling (i.e. the well-known clock
models). At finite coupling, we find that the critical exponents for $q=3,4$
vary with the coupling, and for $q=4$ the transition may turn into a BKT
transition at small coupling. We comment on the similarities and differences of
the phase diagrams with those of quantum simulators of the Abelian-Higgs model
based on ladder-shaped arrays of Rydberg atoms.
We study the scattering of fermions off 't Hooft lines in the Standard Model.
A long-standing paradox suggests that the outgoing fermions necessarily carry
fractional quantum numbers. In a previous paper, we resolved this paradox in
the context of a number of toy models where we showed that the outgoing
radiation is created by operators that are attached to a co-dimension 1
topological surface. This shifts the quantum numbers of the outgoing states
associated to non-anomalous symmetries to be integer valued as required, while
the quantum numbers associated to anomalous symmetries are fractional. Here we
apply these ideas to the Standard Model.
One of the most important practical hallmarks of topological matter is the
presence of topologically protected, exponentially localised edge states at
interfaces of regions characterised by unequal topological invariants. Here, we
show that even when driven far from their equilibrium ground state, Chern
insulators can inherit topological edge features from their parent Hamiltonian.
In particular, we show that the asymptotic long-time approach of the
non-equilibrium steady state, governed by a Lindblad Master equation, can
exhibit edge-selective extremal damping. This phenomenon derives from edge
states of non-Hermitian extensions of the parent Chern insulator Hamiltonian.
The combination of (non-Hermitian) topology and dissipation hence allows to
design topologically robust, spatially localised damping patterns.
We develop a non-perturbative framework to incorporate gauge field
fluctuations into QED3 effective actions in the infrared by fermionic
particle-vortex duality. The utility is demonstrated by the application to
models containing N species of 2-component Dirac fermions in a couple of
solvable and interpretable electromagnetic backgrounds: N = 1 or 2. For the N =
1 model, we establish a correspondence between fermion Casimir energy at finite
density and the magnetic Euler-Heisenberg Lagrangian, and we further evaluate
the correction to their amplitudes. This in turn predicts the amplification of
charge susceptibility and the reduction of magnetic permeability. We
additionally supply physical interpretations to each component of our
calculation as well as alternative derivations based on energy density
measurements in different characteristic lengths. For N = 2, we show that the
magnetic catalysis is erased in a U(1)$\times$U(1) QED3 and therefore there is
no breakdown of chiral symmetry. Some reasoning is offered based on the
properties of the lowest Landau level wave functions.
We describe the chiral Kondo chain model based on the symplectic Kondo effect
and demonstrate that it has a quantum critical ground state populated by
non-Abelian anyons. We show that the fusion channel of two arbitrary anyons can
be detected by locally coupling the two anyons to an extra single channel of
chiral current and measuring the corresponding conductance at finite frequency.
Based on such measurements, we propose that the chiral Kondo chain model with
symplectic symmetry can be used for implementation of measurement-only
topological quantum computations, and it possesses a number of distinct
features favorable for such applications. The sources and effects of errors in
the proposed system are analyzed, and possible material realizations are
discussed.
Nanotechnology has revolutionized the fabrication of hybrid species with
tailored functionalities. A milestone in this field is the DNA conjugation of
nanoparticles, introduced almost 30 years ago, which typically exploits the
affinity between thiol groups and metallic surfaces. Over the last decades,
developments in colloidal research have enabled the synthesis of an assortment
of non-metallic structures, such as high-index dielectric nanoparticles, with
unique properties not previously accessible with traditional metallic
nanoparticles. However, to stabilize, integrate and provide further
functionality to non-metallic nanoparticles, reliable techniques for their
functionalization with DNA will be crucial. Here, we combine well-established
dibenzylcyclooctyne-azide click-chemistry with a simple freeze-thaw method to
achieve the functionalization of silica and silicon nanoparticles, which form
exceptionally stable colloids with a high DNA surface density of 0.2
molecules/nm2. Furthermore, we demonstrate that these functionalized colloids
can be self-assembled into high-index dielectric optical antennas with a yield
of up to 78% via the use of DNA origami. Finally, we extend this method to
functionalize other important nanomaterials, including oxides, polymers,
core-shell and metal nanostructures. Our results indicate that the method
presented herein serves as a crucial complement to conventional thiol
functionalization chemistry and thus greatly expands the toolbox of
DNA-functionalized nanoparticles currently available.

Date of feed: Mon, 01 Jan 2024 01:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Influence of Rhenium Concentration on Charge Doping and Defect Formation in MoS2. (arXiv:2312.17304v1 [cond-mat.mtrl-sci])**

Kyle T. Munson (1), Riccardo Tori (1), Fatimah Habis (2), Lysander Huberich (3), Yu-Chuan Lin (1), Yue Yuan (4), Ke Wang (5), Bruno Schuler (3), Yuanxi Wang (2), John B. Asbury (1, 4), Joshua A. Robinson (1,4,5,6) ((1) Department of Materials Science and Engineering, The Pennsylvania State University, (2) Department of Physics, University of North Texas, (3) nanotechATsurfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, (4) Department of Chemistry, The Pennsylvania State University, (5) Materials Research Institute, The Pennsylvania State University, (6) Department of Physics, The Pennsylvania State University)

**Spectral sum rules reflect topological and quantum-geometric invariants. (arXiv:2312.17318v1 [cond-mat.str-el])**

Alexander Kruchkov, Shinsei Ryu

**The Club Sandwich: Gapless Phases and Phase Transitions with Non-Invertible Symmetries. (arXiv:2312.17322v1 [hep-th])**

Lakshya Bhardwaj, Lea E. Bottini, Daniel Pajer, Sakura Schafer-Nameki

**Skyrmion and incommensurate spin dynamics in centrosymmetric Gd$_2$PdSi$_3$. (arXiv:2312.17323v1 [cond-mat.str-el])**

M. Gomilšek, T. J. Hicken, M. N. Wilson, K. J. A. Franke, B. M. Huddart, A. Štefančič, S. J. R. Holt, G. Balakrishnan, D. A. Mayoh, M. T. Birch, S. H. Moody, H. Luetkens, Z. Guguchia, M. T. F. Telling, P. J. Baker, S. J. Clark, T. Lancaster

**Damage Rate Laws and Failure Statistics for Lumped Coupled-Field Systems via Averaging. (arXiv:2312.17350v1 [physics.app-ph])**

Arjun Roy, Joseph P. Cusumano

**Topological transitions in the site-diluted Yao-Lee spin-orbital model. (arXiv:2312.17359v1 [cond-mat.str-el])**

Vladislav Poliakov, Wen-Han Kao, Natalia B. Perkins

**Time-reversal symmetry breaking in the chemosensory array: asymmetric switching and dissipation-enhanced sensing. (arXiv:2312.17424v1 [physics.bio-ph])**

David Hathcock, Qiwei Yu, Yuhai Tu

**Understanding the magnetic interactions of the zig-zag honeycomb lattice: Application to $\alpha$-RuCl$_3$. (arXiv:2312.17433v1 [cond-mat.str-el])**

E.M. Wilson, J.T. Haraldsen

**Bilayer Vanadium Dioxide Thin Film with Elevated Transition Temperatures and High Resistance Switching. (arXiv:2312.17437v1 [cond-mat.mtrl-sci])**

Achintya Dutta, Ashok P, Amit Verma

**Electrochemical transport in Dirac nodal-line semimetals. (arXiv:2312.17439v1 [cond-mat.mes-hall])**

R. Flores-Calderón, Leonardo Medel, A. Martín-Ruiz

**Phase Boundaries, Isotope Effect and Superconductivity of Lithium Under Hydrostatic Conditions. (arXiv:2312.17498v1 [cond-mat.supr-con])**

Stefano Racioppi (1), Iren Saffarian-Deemyad (2), William Holle (2), Francesco Belli (1), Richard Ferry (3), Curtis Kenney-Benson (3), Jesse Smith (3), Eva Zurek (1), Shanti Deemyad (2) ((1) 1Department of Chemistry, State University of New York at Buffalo, Buffalo, New York, USA, (2) Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah, USA, (3) High Pressure Collaborative Access Team, X-Ray Sciences Division, Argonne National Laboratory, Argonne, IL, USA)

**Electron-doped magnetic Weyl semimetal LixCo3Sn2S2 by bulk-gating. (arXiv:2312.17547v1 [cond-mat.mtrl-sci])**

Hideki Matsuoka, Yukako Fujishiro, Susumu Minami, Takashi Koretsune, Ryotaro Arita, Yoshinori Tokura, Yoshihiro Iwasa

**Effect of Exchange Interaction and Spin-Orbit Coupling on Spin Splitting in CdSnX (X = S, Se and Te) nanoribbons. (arXiv:2312.17562v1 [cond-mat.mtrl-sci])**

Sutapa Chattopadhyay, Vikas Kashid, P. Durganandini, Anjali Kshirsagar

**Utilizing the Janus MoSSe surface polarization property in complementary metal-oxide-semiconductor field effect transistor design. (arXiv:2312.17594v1 [cond-mat.mtrl-sci])**

Yun-Pin Chiu, Hsin-Wen Huang, Yuh-Renn Wu

**Spin-orbit coupling tuned crossover of gaped and gapless topological phases in the chalcopyrite HgSnX 2 (X=N/P): An ab-initio investigation. (arXiv:2312.17669v1 [cond-mat.mtrl-sci])**

Surasree Sadhukhan, Sudipta Kanungo

**Chiral anomaly induced monopole current and nonlinear circular dichroism. (arXiv:2312.17690v1 [cond-mat.str-el])**

Nikolai Peshcherenko, Claudia Felser, Yang Zhang

**Anisotropy-driven topological quantum phase transition in magnetic impurities. (arXiv:2312.17702v1 [cond-mat.str-el])**

Germán G. Blesio, Luis O. Manuel, Armando A. Aligia

**Evidence for $\pi$-shifted Cooper quartets in PbTe nanowire three-terminal Josephson junctions. (arXiv:2312.17703v1 [cond-mat.mes-hall])**

Mohit Gupta, Vipin Khade, Colin Riggert, Lior Shani, Gavin Menning, Pim Lueb, Jason Jung, Régis Mélin, Erik P. A. M. Bakkers, Vlad S. Pribiag

**Contrastive learning through non-equilibrium memory. (arXiv:2312.17723v1 [cond-mat.dis-nn])**

Martin Falk, Adam Strupp, Benjamin Scellier, Arvind Murugan

**Phases of 2d massless QCD with qubit regularization. (arXiv:2312.17734v1 [hep-lat])**

Hanqing Liu, Tanmoy Bhattacharya, Shailesh Chandrasekharan, Rajan Gupta

**Symmetry Breaking in an Extended O(2) Model. (arXiv:2312.17739v1 [hep-lat])**

Leon Hostetler, Ryo Sakai, Jin Zhang, Alexei Bazavov, Yannick Meurice

**Fermion-Monopole Scattering in the Standard Model. (arXiv:2312.17746v1 [hep-th])**

Marieke van Beest, Philip Boyle Smith, Diego Delmastro, Rishi Mouland, David Tong

**Edge-selective extremal damping from topological heritage of dissipative Chern insulators. (arXiv:2304.09040v3 [cond-mat.mes-hall] UPDATED)**

Suraj S. Hegde, Toni Ehmcke, Tobias Meng

**Gauge field fluctuation corrected QED3 effective action by fermionic particle-vortex duality. (arXiv:2308.06916v3 [hep-th] UPDATED)**

Wei-Han Hsiao

**Topological Quantum Computation on a Chiral Kondo Chain. (arXiv:2309.03010v3 [cond-mat.str-el] UPDATED)**

Tianhao Ren, Elio J. König, Alexei M. Tsvelik

**Universal click-chemistry approach for the DNA functionalization of nanoparticles. (arXiv:2309.15534v2 [physics.chem-ph] UPDATED)**

Nicole Siegel, Hiroaki Hasebe, German Chiarelli, Denis Garoli, Hiroshi Sugimoto, Minoru Fujii, Guillermo P. Acuna, Karol Kolataj