New papers on Condensed matter
254 new papers on condensed matter in the last 7 days, within Physics. These are the 50 Pipette rates most worth reading, with the main result in the authors' own words.
The best of the week
Imaging an obstructed Wannier orbital
By measuring the amplitude and phase of the acoustic pressure field, we map the orbital's -like structure and locate its Wannier center in a void between lattice sites---providing the first phase-resolved image of an obstructed Wannier orbital.
PreprintClaims a big stepAutonomous Quantum Transport Measurements of 2D Semiconductors by an AI Agent
Herein, we introduce an AI-driven workflow in which an AI agent performs multi-step, multi-day quantum transport measurements end-to-end.
PreprintObservation of thermally stable polar metallic state in perovskite nitride CeWN 3
In this study, we report a thermally stable polar-metal state in perovskite cerium tungsten nitride.
Peer-reviewed journalClaims a big stepObservation of the orbital Nernst effect
Here, we report the observation of the orbital Nernst effect in Ti.
PreprintClaims a big stepTransport evidence for the orbital Nernst effect
Here, we report the first experimental evidence for the orbital Nernst effect by measuring the magneto-thermopower in the yttrium iron garnet (YIG)/Pt/CuO x heterostructures.
Peer-reviewed journalClaims a big stepAntiferroelectric hafnia down to the 2D limit
In this work, we demonstrate that single-crystalline hafnia, a lead-free CMOS-compatible material, exhibits antiferroelectricity under compressive-strain conditions.
Peer-reviewed journalClaims a big stepReal-world useBulk Superconductivity in Rocksalt LaN
Electrical transport, heat capacity, and magnetization measurements show that LaN is metallic with a superconducting transition at K. Our data establish LaN as the first bulk superconducting member of the rare earth mononitride family and motivates future exploration of the series using the unique processing space afforded by high-pressure optical reactors.
PreprintClaims a big stepResonantly Enhanced Phonon Transport by Magnon Pumping in a Ferromagnetic/Piezoelectric Bilayer
We report the first experimental observation of resonantly enhanced propagating phonon transport induced by magnon pumping in a ferromagnetic/piezoelectric bilayer.
PreprintClaims a big stepTemporal Quadrupole Moments: Floquet Higher-Order Topology with Nonreciprocal Frequency-Converting Corner States
We introduce the temporal quadrupole moment and leverage its nonreciprocal frequency-converting topological corner states to experimentally realize a magnet-free transceiving circulator in a topological time-modulated microwave metasurface.
PreprintClaims a big stepReal-world useElectrical Probing of Dark Excitons through Microwave Permittivity
Here we show that photoexcited excitons in monolayer tungsten disulfide produce a large, optically tunable permittivity at gigahertz frequencies, and that the effect provides a contact-free electrical route to imaging dark excitons at the nanoscale.
PreprintClaims a big stepObservation of the magnetic spin Hall effect in a ferromagnet
Here, using a non-local lateral spin-valve geometry, we electrically identify the MSHE and its reciprocal effect in a perpendicularly magnetized Co-based multilayer.
PreprintClaims a big stepColossal magnetic tunability of excitons in 2D van der Waals magnetic semiconductor CrSBr
Here, we report the observation of remarkably strong magneto-optical effects in the 2D magnetic semiconductor CrSBr that allow probing its magnetic order with unprecedented sensitivity.
Peer-reviewed journalBold claims, read criticallyClaims a big stepInterlayer rotation (twisting) switches interlayer mobility in moiré superlattices
The atomic motions show that slippery, mismatched interfaces—unlike sticky, matching interfaces—exhibit distinct dynamical signatures, such as tenfold increase in interfacial mobility and desynchronized atomic motions.
Peer-reviewed journalIncipient superconductivity and tunable Chern insulators in twisted Bernal bilayer-trilayer graphene
Here we report incipient superconductivity and tunable Chern insulators in twisted Bernal bilayer-trilayer graphene encapsulated by hexagonal boron nitride.
PreprintClaims a big stepTHz-Driven Quantum Ionic Magnetism in a Quantum Paraelectric SrTiO3
Here, we report THz-driven generation and optical detection of quantum ionic magnetism in quantum paraelectric SrTiO3.
PreprintSpectroscopic signatures of persistent exciton condensation in a bulk magnetic topological insulator
These spectral signatures are consistent with the formation of a metastable excitonic condensate state.
PreprintClaims a big stepQuantum noise spectroscopy of nanoscale charge defects in silicon carbide at room temperature
We report real-time, nanoscale observation of single-charge tunneling dynamics at room temperature in 4H-SiC by monitoring the random telegraph noise using optically detected magnetic resonance.
Peer-reviewed journalBold claims, read criticallyReal-world useJamming-controlled stochasticity in metal-insulator switching
Sub-threshold currents erase the short-term memory defined by the nano-domain distribution, recovering stochastic switching, thus offering a path for in-device learning.
Peer-reviewed journalReal-world useSpin-Orbit Induced Confinement of Correlated Bound States in the Continuum
Here we show that spin-orbit coupling in the one-dimensional Fermi-Hubbard model can drive doublons into the two-particle scattering continuum.
PreprintProbing picosecond depairing currents in type-II superconductors
Here we show that picosecond electrical pulses, which act on timescales too short for vortices to move, drive supercurrents up to the intrinsic depairing limit.
Peer-reviewed journalReal-world useGiant In-Plane Bulk Photovoltaic Response in γ-type Indium Selenide from Pressure-Induced Symmetry Breaking
In this study, an innovative pressure-induced emergence of in-plane BPVE is demonstrated in the planar-nonpolar layered bulk semiconductor γ-type indium selenide.
Peer-reviewed journalBold claims, read criticallyCoexistence and Interconversion of Multiple-Order Majorana Modes in Topological Superconductor Films with Varying Thickness
Importantly, the corner modes are well decoupled from the interfacial chiral mode, thereby enabling an unprecedented coexistence of first-, second-, and third-order Majorana modes within a single material platform.
PreprintLaser-Driven Electron Emission Carrying Orbital Angular Momentum from Carbon Nanotubes
Using time-dependent density-functional theory, we demonstrate that laser-driven armchair carbon nanotubes (CNTs) can emit OAM-carrying slow electrons.
PreprintMagnetic Quadrupole Lens and Current-Induced Quadrupolar Dynamics of Antiskyrmion
We demonstrate that antiskyrmions can serve as magnetic quadrupole lenses that focus or defocus electric currents traversing them.
PreprintReal-world usePlane-Wave Photon-Fock Cavity QED-DFT: Chiral-Cavity-Induced Topology in Graphene
This PWFock construction puts first-principles cavity QED of periodic solids on the same footing as the Fock-space coupled-cluster and configuration-interaction methods already developed for molecules, opening hitherto inaccessible systems---materials in a linear or chiral cavity, in particular---to first-principles plane-wave calculations.
PreprintManipulation of ferromagnetism with a light-driven nonlinear Edelstein-Zeeman field
Here we demonstrate non-thermal, ultrafast optical control of ferromagnetism in the centrosymmetric van der Waals semiconductor Cr2Ge2Te6 via a resonant nonlinear Edelstein effect.
Peer-reviewed journalAltermagnetic Kondo Logic via Floquet Symmetry Conversion
We show that an in-plane AC field converts the hidden altermagnetic spin splitting into a locally detectable spin-dependent hybridization channel, which is further amplified by Kondo correlations into a novel altermagnetic Kondo effect.
PreprintNon-Hermitian Topology from Edge Transport in Hermitian Quantum Anomalous Hall Systems
Here we show that it can also arise naturally as an intrinsic transport response of a globally Hermitian quantum anomalous Hall system, without the need for external non-Hermitian engineering.
Preprint with a published versionLee-Yang theorem for fermions
In this work, we prove a Lee-Yang zero-freeness theorem for the partition function of a broad class of interacting fermion models, implying the existence of a provably efficient quantum algorithm for estimating their ground-state energies.
PreprintNonlinear Spin Polarization Enables N\'eel Order Switching in Centrosymmetric Altermagnets
Our results establish a nonlinear electrical write-read scheme for centrosymmetric altermagnets.
PreprintIntra-bandgap Bound-State Magnonics in a Photonic Crystal Waveguide
Here, we experimentally demonstrate intra-bandgap bound-state magnonics by coupling yttrium iron garnet (YIG) spheres to a microwave photonic crystal waveguide.
PreprintTwo-dimensional topological quantum chemistry and catalog of topological materials
We found 4073 topological or obstructed entries, including 905 topological insulators and 1003 obstructed atomic insulators, greatly expanding the library of such materials in two dimensions.
Peer-reviewed journalTopological-Insulator Heterophase Gate Stacks for Transistor Electrostatics
These results identify the position and electronic character of the gate-side screening boundary as additional design variables for transistor electrostatics beyond nominal dielectric capacitance.
PreprintReal-world useIntrinsic anomalous Hall effect in the surface conduction regime of non-magnetic narrow-gap insulator FeSi
Here, we report a robust, zero-field-hysteretic intrinsic AHE confined to the low-temperature surface-conduction regime of the prototypical narrow-gap insulator FeSi.
PreprintCarrier duality from the convergence of Dirac fermions and high-order van Hove singularities
In this study, we report a dual carrier regime in the kagome metal Co3In2S2, wherein the charge transport is governed by high-mobility electrons while the thermodynamic responses exhibit heavy-electron behavior.
PreprintHelical Anomaly from Concurrent and Topology in an Acoustic Semimetal
Here, we realize such concurrent and topology in a two-dimensional acoustic semimetal, revealing pseudospin-selective topological bulk modes arising from the interplay between these distinct invariants, termed helical anomaly bulk states (HABSs).
PreprintBootstrap certification of string order in quantum spin chains
We overcome this by treating string operators as primary objects: bare and endpoint-dressed strings satisfy a closed operator algebra with one another and with local words, yielding a semidefinite program whose cost grows only polynomially with string length.
PreprintUltrastrong coupling of topologically protected edge and bulk magnetoplasmons without a dedicated cavity
By patterning an AlGaN/GaN single quantum well hosting a two-dimensional electron gas into micrometer-scale patches, we tailor the mutual interactions between topologically protected edge and bulk magnetoplasmons, achieving coupling strengths of up to 0.1.
PreprintCharge-4e Superconducting Ground State without Pair Condensation: Exact Quartet Dynamics, Rigorous Order, and a Microscopic Route
A direct charge-\(4e\) superconductor exhibits coherent four-electron order while every charge-\(2e\) pairing channel remains uncondensed.
PreprintClaims a big stepSub-Thermionic Switching in a Negative-Capacitance Bandgap-Change Field-Effect Transistor
At 300~K, the optimized NC-BCFET achieves a subthreshold swing of 15~mV/dec, four times below the Boltzmann limit, improving to 2.5~mV/dec at 100~K.
PreprintRealization of Very High Mobility InAs Quantum Wells on InP Substrates Through Convex InAlAs Graded Buffer Optimization
Advances in the design of the metamorphic InAlAs buffer result in low-temperature electron mobility exceeding cm V s at 2DEG density cm, the highest value yet reported for this material system.
PreprintExact selection of a toric-code vison crystal in a flux-conditioned Kitaev model
The model thus realizes exact nonperturbative gauge-matter feedback: the flux fixes where the Majorana fermions may move, and their zero-point energy selects in return a topologically ordered vison crystal with spontaneously broken translation symmetry.
PreprintBerry curvature dipole generation and nonreciprocal spin photocurrents in ferroelectricity polarized heterostructures
Here, we demonstrate a strategy for BCD generation in semiconductors beyond the monolayer limit via ferroelectric-polarization-driven symmetry breaking in WSe2/LiNbO3 heterostructures.
Peer-reviewed journalMeasure-zero delocalization in the complex plane: exact mobility arcs in a non-Hermitian off-diagonal quasiperiodic lattice
First, we discover mobility arcs---open curved segments in the complex plane---as a new class of mobility edges and the generic form of open mobility edges, which coexist with closed mobility rings in a complementary parameter regime.
PreprintSuperconducting qubit based on altermagnets
Based on these programmable Josephson potentials utilizing altermagnetism, we propose a new class of transmon-like superconducting qubits that combine large anharmonicity with enhanced robustness against decoherence via coherent two-Cooper-pair tunneling.
PreprintRapidly prototyping kagome flat band physics with acoustic metamaterials
Here we present a complete workflow to rapidly prototype flat band systems using acoustic metamaterials.
PreprintBold claims, read criticallyInterlayer-correlated fractional quantum Hall state in a trilayer electron system
Our observation establishes a new member of the Halperin-Laughlin many-body states that extends interlayer coherence to three coupled layers.
Preprint with a published versionMomentum microscopy of a holey nanostructure
Here, we extend the state-of-the-art to a substantially more complex structure and show that a careful analysis of the electron distribution recorded with a momentum microscope provides rich information about both the spatial and momentum distributions on a few-nm and few-m\r{A} scale, respectively.
PreprintInterface engineering of spin triplet Cooper pairs for spin-valve implementation
Here we demonstrate that this current induced triplet spin moment, in conjunction with the magnetic moment of a ferromagnetic layer, can enable a magnetic spin-valve response in Nb/Pt/Ni/Pt/Nb vertical nano-devices.
PreprintDirac Cones in d-wave Altermagnets Enable High-Conductivity and High-Efficiency Spin Sources
In this work, we introduce Dirac cones into two-dimensional d-wave altermagnets, where their intrinsically high carrier mobility enables tunable charge and spin conductivities with high CSE.
PreprintReal-world use