High-field noise in metallic diffusive conductors

Details High-field noise in metallic diffusive conductors High-field noise in metallic diffusive conductors

2000-01-28

arxiv.org/abs/cond-mat/0001412v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pp, one fig. Companion paper to cond-mat/9911251. Final version, to appear in J. Phys.: Cond. Mat

Scientific paper

10.1088/0953-8984/12/24/314

We analyze high-field current fluctuations in degenerate conductors by mapping the electronic Fermi-liquid correlations at equilibrium to their semiclassical non-equilibrium form. Our resulting Boltzmann description is applicable to diffusive mesoscopic wires. We derive a non-equilibrium connection between thermal fluctuations of the current and resistive dissipation. In the weak-field limit this is the canonical fluctuation- dissipation theorem. Away from equilibrium, the connection enables explicit calculation of the excess ``hot-electron'' contribution to the thermal spectrum. We show that excess thermal noise is strongly inhibited by Pauli exclusion. This behaviour is generic to the semiclassical metallic regime.

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