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Dissipative Transport in Quantum Hall Ferromagnets by Spinwave Scattering

A. G. Green·N. R. Cooper
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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.

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A. G. Green, N. R. Cooper. 2002-01-08. Dissipative Transport in Quantum Hall Ferromagnets by Spinwave Scattering. https://doi.org/10.1103/physrevb.65.125329

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