Spectra of magnetoplasma excitations in back-gate Hall bar structures

V. M. Muravev, C. Jiang, I. V. Kukushkin, J. H. Smet, V. Umansky, and K. von Klitzing
Phys. Rev. B 75, 193307 – Published 14 May 2007

Abstract

The microwave response of a two-dimensional electron system with a nearby in situ grown back gate has been investigated in transport. Several resonant absorption peaks are detected in the magnetoresistance and can be assigned to the excitation of collective magnetoplasma modes. The results are compared with data measured on a similar electron system but without gate. The two-dimensional plasma spectrum is drastically altered by the gate and exhibits a linear dispersion instead of the conventional square-root dependence anticipated from theoretical considerations.

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  • Received 6 December 2006

DOI:https://doi.org/10.1103/PhysRevB.75.193307

©2007 American Physical Society

Authors & Affiliations

V. M. Muravev1,2, C. Jiang1, I. V. Kukushkin1,2, J. H. Smet1, V. Umansky3, and K. von Klitzing1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
  • 2Institute of Solid State Physics, RAS, Chernogolovka 142432, Russia
  • 3Braun Center for Submicron Research, Weizmann Institute of Science, Rehovot 76100, Israel

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Vol. 75, Iss. 19 — 15 May 2007

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