Circularly Polarized Resonant Rayleigh Scattering and Skyrmions in the $ν$ = 1 Quantum Hall Ferromagnet

阻挫磁体中圆偏振电场动态生成斯格明子晶体与双半子晶体

Dynamical generation of skyrmion and bimeron crystals by a circularly polarized electric field in frustrated magnets

本研究提出利用圆偏振电场生成斯格明子晶体的新途径，通过数值模拟与Floquet高频展开阐明微观机制，发现不同频段可生成不同拓扑结构，为拓扑磁结构的电场调控提供了理论方案。

Rayleigh Edge Waves in Two-Dimensional Crystals with Lorentz Forces -- from Skyrmion Crystals to Gyroscopic Media

We investigate, within the framework of linear elasticity theory, edge Rayleigh waves of a two-dimensional elastic solid with broken time-reversal and parity symmetries due to a Berry term. As our prime example, we study the elastic edge wave traveling along the boundary of a two-dimensional skyrmion lattice hosted inside a thin-film chiral magnet. We find that the direction of propagation of the Rayleigh modes is determined not only by the chirality of the thin-film, but also by the Poisson ratio of the crystal. We discover three qualitatively different regions distinguished by the chirality …

Topological quantum control: Edge currents via Floquet depinning of skyrmions in the $ν= 0$ graphene quantum Hall antiferromagnet

We propose a defect-to-edge topological quantum quench protocol that can efficiently inject electric charge from defect-core states into a chiral edge current of an induced Chern insulator. The initial state of the system is assumed to be a Mott insulator, with electrons bound to topological defects that are pinned by disorder. We show that a "critical quench" to a Chern insulator mass of order the Mott gap shunts charge from defects to the edge, while a second stronger quench can trap it there and boost the edge velocity, creating a controllable current. We apply this idea to a skyrmion charg…

二维拓扑半金属中的量子霍尔与光响应

Quantum Hall and Light Responses in a 2D Topological Semimetal

研究揭示了二维拓扑半金属中量子霍尔与光响应的拓扑特性，通过光响应解析出霍尔电导的拓扑不变量，并探讨了自旋极化与拓扑半金属的关联。