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, J. H. Smet

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

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.

Original languageEnglish (US)
Article number036602
JournalPhysical Review Letters
Volume102
Issue number3
DOIs
StatePublished - Jan 20 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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