Dissipative transport in quantum Hall ferromagnets by spin-wave scattering

Article

关键词: MAGNETIC-FIELD;    SKYRMIONS;    SYSTEMS;    CONDUCTIVITY;    TEMPERATURE;    DYNAMICS;    INTEGER;    ENERGY;   

DOI  :  10.1103/PhysRevB.65.125329

来源: SCIE

【 摘 要 】

We report on a study of the effect upon electrical transport of spin-wave scattering from charged quasiparticles in nu = 1 quantum Hall ferromagnets, including both Heisenberg (single layer) and easy-plane (bilayer) cases. We derive a quantum Langevin equation to describe the resulting diffusive motion of the charged particle and use this to calculate the contribution to low-temperature conductivity from a density of charged particles. This conductivity has a power-law dependence upon temperature. The contribution is small at low temperatures increasing to a large value at relatively modest temperatures. We comment upon high-temperature transport and upon the contribution of scattering to the width of the zero bias peak in tunneling conductivity.

【 授权许可】

Free