Journal
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
Volume 16, Issue 5, Pages 386-393Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0268-1242/16/5/318
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This paper reports thermopower and conductivity measurements through the metal-insulator transition for two-dimensional electron gases in high-mobility Si-MOSFETs, At low temperatures both thermopower and conductivity show critical behaviour as functions of the electron density. When approaching the critical density from the metallic side the diffusion thermopower appears to diverge and the conductivity vanishes. On the insulating side the thermopower shows an upturn with decreasing temperature. These features have much in common with those expected for an Anderson transition.
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