Electron Interactions and Transport Between Coupled Quantum Hall Edges

Tomlinson, J. W.; Caux, J. -S.; Chalker, J. T.

Electron Interactions and Transport Between Coupled Quantum Hall Edges

Authors

Tomlinson, J. W.

Caux, J. -S.

Chalker, J. T.

Description

We examine the effects of electron-electron interactions on transport between edge states in a multilayer integer quantum Hall system. The edge states of such a system, coupled by interlayer tunneling, form a two-dimensional, chiral metal at the sample surface. We calculate the temperature-dependent conductivity and the amplitude of conductance fluctuations in this chiral metal, treating Coulomb interactions and disorder exactly in the weak-tunneling limit. We find that the conductivity increases with increasing temperature, as observed in recent experiments, and we show that the correlation length characterising conductance fluctuations varies inversely with temperature.
4 pages, 2 figures, typos corrected, Ref. 17 added, minor changes made for publication