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

2008/09/29 by A. D. Chepelianskii, Chepelianskii, A., S. Guéron +9
Physics and Astronomy · #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices

paper · pdf · doi:10.48550/arxiv.0809.4948

openalex publication_date 2008/09/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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-xAl_xAs 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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