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Phys. Rev. Lett. 83, 4377 - 4380 (1999)

Subsea Electron Transport: Pumping Deep within the Fermi Sea

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Mathias Wagner
Hitachi Cambridge Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom

Fernando Sols
Departamento de Física Teórica de la Materia Condensada, C-V and Instituto de Ciencia de Materiales “Nicolás Cabrera,” Universidad Autónoma de Madrid, E-28049 Madrid, Spain

Featured in Physics News Update Received 26 May 1999

The use of a band offset between the two leads of an electron pump driven by local oscillating voltages 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.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.83.4377
DOI: 10.1103/PhysRevLett.83.4377
PACS: 73.50.Pz, 72.40.+w, 73.20.Dx, 73.40.Gk

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