期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.036602
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资金
- INTAS
- RFBR
- GIF
- BMBF
- DFG
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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