Giant Oscillations of Acoustoelectric Current in a Quantum Channel
Abstract
A theory of d.c. electric current induced in a quantum channel by a propagating surface acoustic wave (acoustoelectric current) is worked out. The first observation of the acoustoelectric current in such a situation was reported by J. M. Shilton et al., Journ. Phys. C (to be published). The authors observed a very specific behavior of the acoustoelectric current in a quasi-one-dimensional channel defined in a GaAs-AlGaAs heterostructure by a split-gate depletion -- giant oscillations as a function of the gate voltage. Such a behavior was qualitatively explained by an interplay between the energy-momentum conservation law for the electrons in the upper transverse mode with a finite temperature splitting of the Fermi level. In the present paper, a more detailed theory is developed, and important limiting cases are considered.
Keywords
Cite
@article{arxiv.cond-mat/9603201,
title = {Giant Oscillations of Acoustoelectric Current in a Quantum Channel},
author = {Harald Totland and Yuri Galperin},
journal= {arXiv preprint arXiv:cond-mat/9603201},
year = {2009}
}
Comments
7 pages, 2 Postscript figures, RevTeX 3.0