Long-Range Coulomb Interaction and Frequency Dependence of Shot Noise in Mesoscopic Diffusive Contacts

Details Long-Range Coulomb Interaction and Frequency Dependence of Shot Noise in Mesoscopic Diffusive Contacts Long-Range Coulomb Interaction and Frequency Dependence of Shot Noise in Mesoscopic Diffusive Contacts

1997-06-03

arxiv.org/abs/cond-mat/9706024v2

Phys. Rev. B57, 4628 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, Latex, 2 Latex figures, 4 Postscript figures. Minor changes in the text; nonzero polarizability of insulator taken i

Scientific paper

10.1103/PhysRevB.57.4628

The frequency dependence of shot noise in mesoscopic diffusive contacts is calculated with account taken of long-range Coulomb interaction and external screening. While the low-frequency noise is 1/3 of noise of classical Poisson process independently of the contact shape, the high-frequency noise tends to the full classical value for long and narrow contacts because of strong screening by the surrounding medium. In this case, the current fluctuations at opposite ends of the contact are completely independent.

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