Acoustoelectric pumping through a ballistic point contact in the presence of magnetic fields

O. Entin-Wohlman, Y. Levinson, and P. Wölfle
Phys. Rev. B 64, 195308 – Published 15 October 2001
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Abstract

The acoustoelectric current J induced in a ballistic point contact (PC) by a surface acoustic wave is calculated in the presence of a perpendicular magnetic field B. It is found that the dependence of the current on the Fermi energy in the terminals is strongly correlated with that of the PC conductance: J is small at the conductance plateaus and is large at the steps. Like the conductance, the acoustoelectric current has the same functional behavior as in the absence of a field, but with renormalized energy scales, which depend on the strength of the magnetic field |B|.

  • Received 22 April 2001

DOI:https://doi.org/10.1103/PhysRevB.64.195308

©2001 American Physical Society

Authors & Affiliations

O. Entin-Wohlman

  • School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel

Y. Levinson

  • Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel

P. Wölfle

  • Institut für Theorie der Kondensierten Materie, Universität Karlsruhe and Institut für Nanotechnologie, Forschungszentrum, Karlsruhe 76128 Karlsruhe, Germany

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Issue

Vol. 64, Iss. 19 — 15 November 2001

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