Dissipative Transport in Quantum Hall Ferromagnets by Spinwave Scattering
Abstract
We report on a study of the effect upon electrical transport of spinwave scattering from charged quasiparticles in nu=1 quantum Hall ferromagnets (QHFs), 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 inter-layer tunneling conductance.
Cite
@article{arxiv.cond-mat/0201095,
title = {Dissipative Transport in Quantum Hall Ferromagnets by Spinwave Scattering},
author = {A. G. Green and N. R. Cooper},
journal= {arXiv preprint arXiv:cond-mat/0201095},
year = {2016}
}
Comments
9 pages. Accepted for publication in PRB