| Issue |
Europhys. Lett.
Volume 53, Number 1, January 2001
|
|
|---|---|---|
| Page(s) | 66 - 71 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00124-7 | |
| Published online | 01 December 2003 | |
On the dephasing time of the chiral metal
Department of Physics, Theoretical Physics,
University of Oxford 1 Keble Road, Oxford, OX1 3NP, UK
Received:
26
July
2000
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
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