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VOLUME 76 (2002) | ISSUE 7 | PAGE 547
Observation of a light-induced nonohmic current in a toroidal-moment-possessive nanostructure
PACS: 73.20.Dx, 73.50.-h
Abstract
We report on the first observation of light-induced nonohmic current in a semiconductor nanostructure. The effect is revealed in unbiased asymmetric InAs quantum well under the excitation by far-infrared laser radiation in presence of a tilted magnetic field. It is interpreted in terms of nonzero toroidal moment of the two-dimensional electron gas.