A. Crepieux, M. Guigou, A. Popoff, P. Devillard, T. Martin
Published 2007-04-11Version 1
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.
Comments: Proceedings of the 6th Rencontres du Vietnam, Hanoi (2006)
Photo-assisted shot noise in the fractional quantum Hall regime
Charged exctions in the fractional quantum Hall regime
Manifestation of a complex edge excitation structure in the fractional quantum Hall regime at high filling factors
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