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arXiv · 0809.4948

Magnetic field anti-symmetry of photovoltaic voltage in evanescent microwave fields

A. Chepelianskii·S. Guéron·F. Pierre·A. Cavanna·B. Etienne·H. Bouchiat
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Abstract

A two dimensional electron system without spatial inversion symmetry develops a sample specific dc voltage when exposed to a microwave radiation at low temperature. We investigate this photovoltaic (PV) effect, in the case where spatial symmetry is broken by an evanescent high-frequency potential. We measure the induced PV voltage in a ${\rm GaAs/Ga_{1-x}Al_{x}As}$ Hall bar at magnetic fields in the Tesla range. We find that in this regime the induced PV voltage is anti-symmetric with magnetic field, and exhibits regular Shubnikov-de Haas like oscillations. Our experimental results can be understood from a simple model, which describes the effect of stationary orbital currents caused by microwave driving.

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A. Chepelianskii, S. Guéron, F. Pierre, A. Cavanna, B. Etienne, H. Bouchiat. 2008-09-29. Magnetic field anti-symmetry of photovoltaic voltage in evanescent microwave fields. https://arxiv.org/abs/0809.4948

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