Nonlinear voltage dependence of shot noise

Details Nonlinear voltage dependence of shot noise Nonlinear voltage dependence of shot noise

1999-02-23

arxiv.org/abs/cond-mat/9902306v1

Phys. Rev. B vol.60, 16900 (1999)

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevB.60.16900

The current noise in a multi-probe mesoscopic conductor can have a nonlinear dependence on the strength of driving bias voltage. This paper presents a theoretical formulation for the nonlinear noise spectra. We pay special attention to maintain gauge invariance at the nonlinear level. At small but finite voltages, explicit expressions for nonlinear noise spectra, expanded order by order in the bias, have been derived. In the wideband limit, a closed form solution of the noise spectra for finite voltages is obtained.

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