Photocurrent and Photovoltage Oscillations in the Two-Dimensional Electron System: Enhancement and Suppression of Built-In Electric Fields

S. I. Dorozhkin, I. V. Pechenezhskiy, L. N. Pfeiffer, K. W. West, V. Umansky, K. von Klitzing, and J. H. Smet
Phys. Rev. Lett. 102, 036602 – Published 23 January 2009

Abstract

We observe microwave-induced photocurrent and photovoltage oscillations around zero as a function of the applied magnetic field in high mobility GaAs 2D electron systems. The photosignals pass zero whenever the microwave frequency is close to a multiple of the cyclotron resonance frequency. They originate from built-in electric fields due to for instance band bending at contacts. The oscillations correspond to a suppression (screening) or an enhancement (“antiscreening”) of these fields by the photoexcited electrons.

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  • Received 26 June 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.036602

©2009 American Physical Society

Authors & Affiliations

S. I. Dorozhkin1,2, I. V. Pechenezhskiy2, L. N. Pfeiffer3, K. W. West3, V. Umansky4, K. von Klitzing1, and J. H. Smet1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany
  • 2Institute of Solid State Physics, Chernogolovka, Moscow district, 142432, Russia
  • 3Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, USA
  • 4Department of Physics, Weizmann Institute of Science, 76100 Rehovot, Israel

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Issue

Vol. 102, Iss. 3 — 23 January 2009

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