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VOLUME 35 (1982) | ISSUE 5 | PAGE 204
Lower limit on the mobility of charge carriers forming a two-dimensional gas
Transport of the holes of a two-dimensional (2D) gas on germanium surfaces cleaved in helium has been studied experimentally. During scattering by Coulomb centers the mobility of the 2D holes approaches a lower limit as the temperature is lowered. This limit is independent of the sample temperature and of the density of scattering centers.