Heating of two-dimensional electron gas and LO-phonons in delta-doped GaAs by far-infrared radiation

URN to cite this document:: urn:nbn:de:bvb:355-epub-22338

Kotel'nikov, I. ; Shul'man, A. ; Ganichev, Sergey ; Varvanin, N. ; Mayerhofer, B. ; Prettl, Wilhelm

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Date of publication of this fulltext: 05 Aug 2009 13:38

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Abstract

A change in the conductivity of the two-dimensional electron gas in δ-doped GaAs samples due to pulsed far-infrared laser irradiation has been detected. It is shown that the observed positive photoconductivity is caused by heating of 2D electrons. The energy loss of hot electrons is accomplished by scattering with nonequilibrium longitudinal optical (LO) phonons. An expression for the effective ...