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.

9 pages. Accepted for publication in PRB

References in corpus (4)

• Observation of a Linearly Dispersing Collective Mode in a Quantum Hall Ferromagnet
• Theory of interlayer tunneling in bi-layer quantum Hall ferromagnets
• Josephson Effect Without Superconductivity: Realization in Quantum Hall Bilayers
• Interlayer tunneling in double-layer quantum Hall pseudo-ferromagnets

Cited by in corpus (4)

• Electrical generation and detection of spin waves in a quantum Hall ferromagnet
• Thermodynamics of free and bound magnons in graphene
• NMR linewidth and Skyrmion localization in quantum Hall ferromagnets
• Tuning Spin Transport in a Graphene Antiferromagnetic Insulator