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Neutral Fermions at $ν=1/2$

Dung-Hai Lee
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Abstract

We present a particle-hole symmetric theory for a two-dimensional electron gas at filling factor one half. In this theory, elementary excitations are dipole-like fermions floating on top of the $ν=1/2$ boson quantum Hall liquid. In the absence of disorder these dipoles can form a Fermi-liquid. Disorder can break them apart and drive the ground state into a quantum critical state.

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Dung-Hai Lee. 1998-03-11. Neutral Fermions at $ν=1/2$. https://arxiv.org/abs/cond-mat/9709233

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