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Optical evidence for the impurity band nature of the metal-insulator transition in GaAs

✍ Scribed by Ming-Way Lee; D. Romero; H.D. Drew; M. Shayegan; B.S. Elman


Publisher
Elsevier Science
Year
1988
Tongue
English
Volume
66
Category
Article
ISSN
0038-1098

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It is demonstrated that the upper Hubbard band (UHB) can play an important role in the hopping conductivity; 2D geometry and vicinity of the metal-insulator transition emphasize this role. A simple model for the recently observed metal-insulator transition is suggested. The model starts from the ins