cond-mat.mes-hall

Stable Wave-Function Zeros Indicate Exciton Topology

Disorder-induced crossover from phase-averaging to mode-mixing regimes in magnetic domain walls of a second-order topological insulator

This paper investigates electronic transport across magnetic domain walls in 3D second-order topological insulators under Anderson disorder, revealing a disorder-induced crossover from a phase-averaging regime to a mode-mixing regime characterized by distinct two-step plateaus in conductance fluctuations and Fano factors.

Tailoring Germanium Heterostructures for Quantum Devices with Machine Learning

This paper demonstrates that enriching unstrained Germanium channels with localized, strained silicon spikes, optimized via multi-objective Bayesian learning, can enhance spin-orbit interaction by up to three orders of magnitude and significantly improve quantum dot qubit quality factors, thereby overcoming limitations in current Ge/SiGe heterostructures for scalable quantum devices.

Neural surrogates for crystal growth dynamics with variable supersaturation: explicit vs. implicit conditioning

Electronic and Vibrational Properties of On-Surface Synthesized Gulf-Edged Chiral Graphene Nanoribbons

This paper reports the successful on-surface synthesis and comprehensive characterization of a novel gulf-edged chiral graphene nanoribbon, establishing a new design motif that yields a 1.8 eV bandgap semiconductor while revealing distinctive vibrational fingerprints and ambient instability linked to edge features.

Bismuth Films on EuO(111) as a Platform for Proximity-Induced Topological States

This study experimentally demonstrates that epitaxial bismuth films grown on ferromagnetic EuO(111) substrates form a stable, room-temperature quantum spin Hall insulator with edge-localized states, establishing a viable platform for realizing magnetically tunable higher-order topological phases.

Enhancing Coherence of Spin Centers in p-n Diodes via Optimization Algorithms

This paper introduces a scaled gradient descent optimization algorithm to determine the ideal design parameters for SiC p-i-n diodes hosting divacancy spin centers, effectively minimizing optical linewidth and maximizing spin coherence while adhering to realistic physical constraints and mitigating leakage current noise.

Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics

This paper introduces a "cryogenic shock exfoliation" method combined with low-pressure van der Waals assembly to produce large-area, high-yield rhombohedral multilayer graphene devices exhibiting ultrahigh mobility and uniform correlated electron phases, thereby overcoming previous material abundance and fabrication limitations.

Imaging the transition from diffusive to Landauer resistivity dipoles

Using scanning tunneling potentiometry on two-dimensional bismuth films, researchers experimentally observed the crossover from diffusive to Landauer resistivity dipoles around defects of varying sizes, confirming Landauer's postulate of size-independent residual resistivity and enabling the estimation of key carrier parameters.

Versatile multi-q antiferromagnetic charge order in correlated vdW metals

Using low-temperature scanning tunneling microscopy, researchers discovered that the van der Waals metal CeTe3 hosts versatile, competing antiferromagnetic charge-ordered states (stripe and checkerboard) tunable by modest magnetic fields, revealing a rich, strongly correlated electronic landscape that extends beyond weak-coupling descriptions and offers a new platform for engineering tunable nanoscale quantum states.