On the dephasing time of the chiral metal

Details On the dephasing time of the chiral metal On the dephasing time of the chiral metal

2000-10-05

arxiv.org/abs/cond-mat/0010082v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 1 figure, europhys.sty

Scientific paper

10.1209/epl/i2001-00124-7

In the low-dimensional disordered systems the dephasing time and the inelastic scattering (out-scattering) time are in general different. We show that in the case of the two-dimensional chiral metal which is formed at the surface of a layered three dimensional system, which is exhibiting the integer quantum Hall effect these two quantities are essentially the same and their temperature-dependence is T^(-3/2). In particular we show that the results obtained using the diagramatic technique and the phase uncertainty approach introduced by A. Stern et al. (Phys. Rev. A 41, 3436 (1990)) for the out-scattering and the dephasing time respectively, coincide. We furthermore consider these quantities in the case of the three-dimensional chiral metal, where similar conclusions are reached.

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