A Fermi Pump
The use of a band offset between the two leads of an electron pump driven by a locally applied oscillating gate voltage is shown to increase the pump current dramatically. A spectral analysis reveals that the bulk of the pump current flows deep within the Fermi sea and not at the Fermi surface, especially in higher spatial dimensions, thereby rendering this effect insensitive to temperature.
KeywordsFermi Surface Transmission Probability Incident Electron Pump Current Spatial Asymmetry
Unable to display preview. Download preview PDF.
- D. J. Thouless, Phys. Rev. B 27, 6083 (1983).Google Scholar
- T. H. Stoof and Y. V. Nazarov, Phys. Rev. B 53, 1050 (1996).Google Scholar
- G. Burmeister and K. Maschke, Phys. Rev. B 57, 13050 (1998).Google Scholar
- W. Ruppel, R. von Baltz, and P. Würfel, Ferroelectrics 43, 109 (1982).Google Scholar
- M. Wagner, Phys. Rev. B 49, 16544 (1994).Google Scholar
- L. Lewin, Polylogarithms and Associated Functions (North Holland, New York, 1981).Google Scholar