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Quantum Hall Ferromagnets

Tin-Lun Ho
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Abstract

It is pointed out recently that the $ν=1/m$ quantum Hall states in bilayer systems behave like easy plane quantum ferromagnets. We study the magnetotransport of these systems using their ``ferromagnetic" properties and a novel spin-charge relation of their excitations. The general transport is a combination of the ususal Hall transport and a time dependent transport with $quantized$ time average. The latter is due to a phase slippage process in $spacetime$ and is characterized by two topological constants. (Figures will be provided upon requests).

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Tin-Lun Ho. 1994-03-16. Quantum Hall Ferromagnets. https://doi.org/10.1103/physrevlett.73.874

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