Frequency dispersion of photon-assisted shot noise in mesoscopic conductors

Details Frequency dispersion of photon-assisted shot noise in mesoscopic conductors Frequency dispersion of photon-assisted shot noise in mesoscopic conductors

2006-06-29

arxiv.org/abs/cond-mat/0606775v1

Phys. Rev. B vol. 75, 165315 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 Figures

Scientific paper

10.1103/PhysRevB.75.165315

We calculate the low-frequency current noise for AC biased mesoscopic chaotic cavities and diffusive wires. Contrary to what happens for the admittance, the frequency dispersion is not dominated by the electric response time (the "RC" time of the circuit), but by the time that electrons need to diffuse through the structure (dwell time or diffusion time). Frequency dispersion of noise stems from fluctuations of the Fermi distribution function that preserve charge neutrality. Our predictions can be verified with present experimental technology.

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