Photoconductivity of 2$D$ electrons over helium in the presence of cyclotron pumping

V. B. Shikin

Institute of Solid State Physics, Russian Academy of Sciences

Abstract: Recent measurements of photoconductivity for 2$D$ electrons at the helium surface in the presence of a magnetic field orthogonal to the 2$D$ plane require a qualitative explanation, because of the very fact of its existence. Various scenarios of the effect are discussed, and arguments in favor of one of these that which is associated with the emergence of thermoelectric power along a 2$D$ charged system in a magnetic field under the effect of a spatially nonuniform external pumping are presented. The corresponding nonuniform electron distribution $\delta n_s$ (against the background of the uniform distribution) leads to the effect that is observed with the aid of Corbino disks and which consists in a change in the conductivity of the 2$D$ system.

PACS: 67.70.+n, 72.60.+g

Received: 24.07.2003
Revised: 06.08.2003

 English version: Journal of Experimental and Theoretical Physics Letters, 2003, 78:5, 314–318

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