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Possibility of the Excitonic Phase in Insulators

✍ Scribed by R. Zimmermann

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
630 KB
Volume
39
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

Applying many‐particle methods the lowest excitation energy of the exciton is calculated for an insulator with small energy gap. Screening is taken into account by means of a self‐consistent k‐dependent screening function. At the finite critical gap G~c~ the excitation energy vanishes leading to the excitonic phase.

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