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Remarks on Luttinger's Derivation of Kubo's Conductivity Formula

✍ Scribed by M. H. Lee

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 221 KB
Volume: 39
Category: Article
ISSN: 0005-8025
DOI: 10.1002/ctpp.2150390135

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✦ Synopsis

Luttinger has given a derivation of Kubo's static conductivity formula in a famous paper some thirty years ago. In a subsequent analysis to obtain the Einstein relation, he introduced an assumption. We show that this assumption is not Consistent with linear response theory, on the basis of which the conductivity formula is derived. This inconsistency can be removed. At the same time, one can extend Luttinger's treatment to include the dynamic conductivity. This generalization is allowed by the recurrence relations method, which solves the Heisenberg equation of motion formally as well as explicitly.

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