cond-mat.mes-hall

Higher odd-order nonlinear Hall effect in magnetic topological insulator Mn(Bi1-xSbx)2Te4

This study reports the experimental observation of higher odd-order (third-, fifth-, and seventh-order) nonlinear Hall effects in magnetic topological insulator Mn(Bi1-xSbx)2Te4 thin flakes, attributing the phenomenon to Berry curvature multipoles and demonstrating its dependence on the Néel temperature and charge neutral point.

Collective Excitations and Stability of Nonequilibrium Polariton Supersolids

This paper investigates the collective excitation spectra and stability of nonequilibrium polariton supersolids, demonstrating that spontaneously broken symmetries give rise to gapless Nambu-Goldstone modes and that attractive interactions mediated by the excitonic reservoir are essential for stabilizing the phase in semiconductor metasurfaces.

Design optimization of flux concentrators for magnetic tunnel junctions-based sensors

This paper presents a design optimization scheme for magnetic tunnel junction-based sensors that balances flux concentrator gain and magnetic noise through finite element simulations and analytical modeling, ultimately achieving a three-orders-of-magnitude performance improvement over single-junction designs.

Symplectic symmetry of quadratic-band-touching Hamiltonians in two dimensions

This paper identifies the internal low-energy symmetry of two-dimensional quadratic-band-touching Hamiltonians as the unitary symplectic group $USp(2N)$, constructs the corresponding rotationally invariant interacting theory, and demonstrates that for lattice systems like honeycomb, this symmetry reduces to the unitary group $U(N)$ through the intersection of symplectic and orthogonal symmetries.

Chiral spin-textures in van der Waals heterostructures

This review article examines the fundamental mechanisms, experimental advances, and theoretical insights regarding the formation and manipulation of chiral spin textures in van der Waals heterostructures, while outlining future challenges for developing robust, room-temperature spintronic devices.

Modulation of Spin Angular Momentum of Emission in Symmetric 1D Plasmonic Crystals by Cathodoluminescence

This study demonstrates that symmetric one-dimensional plasmonic crystals can generate controllable circularly polarized light with tunable spin angular momentum through electron-beam excitation, where interference effects enable efficient modulation based on emission angle and excitation position.

Magnetic-flux tunable electronic transport through domain walls in a three-dimensional second-order topological insulator

This paper demonstrates that applying a magnetic field to a three-dimensional second-order topological insulator nanowire with a magnetic domain wall induces a tunable Aharonov-Bohm oscillation in electronic conductance, mediated by chiral hinge states and a $\pi$-spin rotation, thereby offering a novel method for controlling and detecting these topological states.

Emergence of a non-bulk hexagonal Fe$_2$S$_2$ single layer via phase transformation

This paper reports the successful synthesis and characterization of a previously unknown, non-bulk hexagonal Fe$_2$S$_2$ single layer with a $\beta$-CuI structure, which is stabilized on a graphene/Ir(111) substrate through the thermal transformation of mackinawite and confirmed by combined experimental microscopy and first-principles calculations.

DC Cryogenic Modeling of Open-Source SkyWater 130 nm MOSFETs at 77 K Using BSIM4

This paper presents a publicly available, SPICE-compatible BSIM4 model for SkyWater 130 nm MOSFETs at 77 K, developed through DC characterization to enable reliable, low-power circuit design for high-energy physics applications such as liquid argon detectors.

Stable Wave-Function Zeros Indicate Exciton Topology