Electron Localization in the Quantum-Hall Regime

Details Electron Localization in the Quantum-Hall Regime Electron Localization in the Quantum-Hall Regime

2005-04-03

arxiv.org/abs/cond-mat/0504054v2

Phys. Rev. Lett. 95, 196805 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Slightly edited from previous version

Scientific paper

10.1103/PhysRevLett.95.196805

The theory of the insulating state discriminates between insulators and metals by means of a localization tensor, which is finite in insulators and divergent in metals. In absence of time-reversal symmetry, this same tensor acquires an offdiagonal imaginary part, proportional to the dc transverse conductivity, leading to quantization of the latter in two-dimensional systems. I provide evidence that electron localization--in the above sense--is the common cause for both vanishing of the dc longitudinal conductivity and quantization of the transverse one in quantum-Hall fluids.

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