Photo-assisted shot noise in Coulomb interacting systems

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We consider the fluctuations of the electrical current (shot noise) in the presence of a voltage time-modulation. For a non-interacting metal, it is known that the derivative of the photo-assisted noise has a staircase behavior. In the presence of Coulomb interactions, we show that the photo-assisted noise presents a more complex profile, in particular for the two following systems: 1) a two-dimensional electron gas in the fractional quantum Hall regime for which we have obtained evenly spaced singularities in the noise derivative, with a spacing related to the filling factor and, 2) a carbon nanotube for which a smoothed staircase in the noise derivative is obtained.
Proceedings of the 6th Rencontres du Vietnam, Hanoi (2006)

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/127208

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0704.1427
 http://arxiv.org/abs/0704.1427

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arXiv