Coulomb Effects and Electron Transport Through a Coherent Conductor

Details Coulomb Effects and Electron Transport Through a Coherent Conductor Coulomb Effects and Electron Transport Through a Coherent Conductor

2001-05-07

arxiv.org/abs/cond-mat/0105132v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures. To be published in the Proceedings of the Rencontres de Moriond Conference "Electronic Correlations: From

Scientific paper

We analyze electron transport through relatively short coherent conductors in the presence of Coulomb interaction. We evaluate the current-voltage characteristics of such conductors taking into account the effect of an external environment. Within our model, at large conductances and low $T$ the conductance is suppressed by a universal factor which depends only on the type of the conductor. We also argue that at T=0 the system ``scatterer+shunt'' can be either an insulator or a metal depending on whether its total resistance is larger or smaller than $R_Q=h/e^2\approx 25.8$ k$\Omega$. In a metallic phase the Coulomb gap is fully suppressed by quantum fluctuations.

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