Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-06-23
Phys. Rev. B 80, 125418 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
11 pages, 3 figures. v2: minor changes, published version
Scientific paper
10.1103/PhysRevB.80.125418
Recent experiment [S.I. Dorozhkin et al., Phys. Rev. Lett. 102, 036602 (2009)] on quantum Hall structures with strongly asymmetric contact configuration discovered microwave-induced photocurrent and photovoltage magnetooscillations in the absence of dc driving. We show that in an irradiated sample the Landau quantization leads to violation of the Einstein relation between the dc conductivity and diffusion coefficient. Then, in the presence of a built-in electric field in a sample, the microwave illumination causes photo-galvanic signals which oscillate as a function of magnetic field with the period determined by the ratio of the microwave frequency to the cyclotron frequency, as observed in the experiment.
Dmitriev I. A.
Dorozhkin S. I.
Mirlin Alexander D.
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