A Fermi Surface Driven Spiral Spin Liquid

This study identifies EuAg4_4Sb2_2 as a model material for a Fermi surface-driven spiral spin liquid, where diffuse neutron scattering and Monte Carlo simulations reveal that quasi-2D hole-mediated interactions create a manifold of nearly degenerate spin modulations, offering new design principles for materials with intertwined electronic, magnetic, and topological properties.

Paul M. Neves, Chi Ian Jess Ip, Takashi Kurumaji + 6 more2026-03-05🔬 cond-mat.mes-hall

Electrostatically-induced topological phase transitions in polyacetylene molecules

This paper employs the Takayama-Lin-Liu-Maki model and Abelian bosonization to demonstrate that an external gate voltage induces a sequence of topological phase transitions in trans-polyacetylene molecules, where the ground state evolves through distinct multikink solutions characterized by an integer topological invariant that quantifies both bound charge and dimerization domain walls, with the phase diagram significantly influenced by repulsive Coulomb interactions.

Tomás Suleiman, Aníbal Iucci, Alejandro Martín Lobos2026-03-05🔬 cond-mat.mes-hall

Symmetry selection rules for the intrinsic nonlinear thermal Hall effect in altermagnets: Role of quantum metric and C2C_{2} rotational symmetry

This paper establishes that the intrinsic nonlinear thermal Hall effect in altermagnets is governed by specific symmetry selection rules requiring a nontrivial quantum metric and the simultaneous breaking of mirror and twofold rotational symmetries, a condition naturally met by dd-wave but not gg-wave systems due to their distinct orbital hybridization properties.

Gunn Kim2026-03-05🔬 cond-mat.mes-hall

Multimode cavity magnonics in mumax+: from coherent to dissipative coupling in ferromagnets and antiferromagnets

This paper introduces a two-tier extension for the GPU-accelerated micromagnetic framework mumax+ that enables efficient, spatially resolved simulation of multimode cavity magnonics in both ferromagnets and antiferromagnets, successfully validating the tool through eight benchmarks covering phenomena ranging from coherent coupling and mode-selective addressing to dissipative interactions and level attraction.

Gyuyoung Park, OukJae Lee, Biswanath Bhoi2026-03-05🔬 cond-mat.mes-hall

Non-reciprocity and exchange-spring delay of domain-wall Walker breakdown in magnetic nanowires with azimuthal magnetization

This paper demonstrates that in 3D magnetic nanowires with azimuthal magnetization, the intrinsic topology of vortex-state domains creates an exchange-spring effect that robustly delays Walker breakdown, while curvature introduces a significant non-reciprocal delay dependent on the chirality of the domain relative to the domain wall's motion.

Lucía Gómez-Cruz, Laura Álvaro-Gómez, Claudia Fernández-González + 13 more2026-03-05🔬 cond-mat.mes-hall

Skyrmion generation via Laguerre-Gaussian beam irradiation in frustrated magnets

This paper establishes a theoretical framework for light-induced skyrmion generation in frustrated magnets by demonstrating that Laguerre-Gaussian beam irradiation nucleates skyrmions through distinct mechanisms—stochastic thermal nucleation in the ferromagnetic phase and thermal annealing in the skyrmion-lattice phase—depending on the thermodynamic region.

Reivienne Jei Laxamana, Satoru Hayami2026-03-05🔬 cond-mat.mes-hall

Probing pure spin-rotation quantum geometry in persistent spin textures via nonlinear transport

This paper proposes the spin-rotation quantum geometric tensor as a novel probe to experimentally access the intrinsic geometry of persistent spin textures by demonstrating that it generates a unique, direction-independent nonlinear gyrotropic current, thereby overcoming the limitations of conventional geometric measurements in these systems.

Neelanjan Chakraborti, Akash Dey, Snehasish Nandy + 2 more2026-03-05🔬 cond-mat.mes-hall

Interfering trajectories in a ballistic Andreev cavity

This paper presents the first study of ballistic Andreev transport in a two-dimensional HgTe quantum well cavity, demonstrating that two distinct finite-bias conductance peaks arise from different classes of interfering trajectories—one dominated by normal reflection and the other by retro-reflected Andreev processes—which exhibit contrasting responses to magnetic fields due to Aharonov-Bohm and Doppler shift effects.

Pankaj Mandal, Marcel Kaschper, Fernando Dominguez + 9 more2026-03-05🔬 cond-mat.mes-hall