Photogalvanic effect and photoconductance in a quantum channel with a single short-range scatterer

Details Photogalvanic effect and photoconductance in a quantum channel with a single short-range scatterer Photogalvanic effect and photoconductance in a quantum channel with a single short-range scatterer

2008-11-09

arxiv.org/abs/0811.1356v2

Phys. Rev. B 79, 235428 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Appendix is added, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.79.235428

The influence of electromagnetic radiation on the electron transport in a quantum channel with a single short-range scatterer is investigated using a generalized Landauer-Buttiker approach. We have shown that asymmetrical position of the scatterer leads to appearance of the direct photocurrent in the system. The dependence of the photocurrent on the electron chemical potential, the position of the scatterer, and the frequency of the radiation is studied. We have shown that the photocurrent and the photoconductance oscillate as functions of the electron chemical potential. The nature of oscillations is discussed.

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