Electronic dephasing in wires due to metallic gates

Details Electronic dephasing in wires due to metallic gates Electronic dephasing in wires due to metallic gates

2004-06-15

arxiv.org/abs/cond-mat/0406338v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages

Scientific paper

10.1103/PhysRevB.71.045424

The dephasing effect of metallic gates on electrons moving in one quasi--one--dimensional diffusive wires is analyzed. The incomplete screening in this geometry implies that the effect of the gate can be described, at high energies or temperatures, as an electric field fluctuating in time. The resulting system can be considered a realization of the Caldeira-Leggett model of an environment coupled to many particles. Within the range of temperatures where this approximation is valid, a simple estimation of the inverse dephasing time gives $\tau_{\rm G}^{-1} \propto T^{1/2}$.

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