title: Photocurrent and photovoltage oscillations in the two-dimensional electron system: enhancement and suppression of built-in electric fields.
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.
authors.affiliation: Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
authors.forename: S I
authors.initials: SI
authors.lastname: Dorozhkin
authors.forename: I V
authors.initials: IV
authors.lastname: Pechenezhskiy
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: K W
authors.initials: KW
authors.lastname: West
authors.forename: V
authors.initials: V
authors.lastname: Umansky
authors.forename: K
authors.initials: K
authors.lastname: von Klitzing
authors.forename: J H
authors.initials: JH
authors.lastname: Smet