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A Possible Role of the D– Band in Hopping Conductivity and Metal–Insulator Transition in 2D Structures

✍ Scribed by V.I. Kozub

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
101 KB
Volume
230
Category
Article
ISSN
0370-1972

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✦ Synopsis

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 insulating limit and implies a principal role of the UHB. It gives a qualitative explanation for most of the features of the transition. The quantitative analysis of MR in the strongly insulating limit leads to values of g-factors in good agreement with the known values.

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