On the dephasing time of the chiral metal
Department of Physics, Theoretical Physics,
University of Oxford 1 Keble Road, Oxford, OX1 3NP, UK
Accepted: 31 October 2000
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 . 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 (1990) 3436) 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.
PACS: 73.23.-b – Mesoscopic systems / 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 73.40.Hm – Quantum Hall effect (integer and fractional)
© EDP Sciences, 2001