PAIRING, CONDENSATION, AND SUPERCONDUCTIVITY DESCRIBED BY A HUBBARD-MODEL WITH AN ATTRACTIVE INTERACTION
UNSPECIFIED. (1991) PAIRING, CONDENSATION, AND SUPERCONDUCTIVITY DESCRIBED BY A HUBBARD-MODEL WITH AN ATTRACTIVE INTERACTION. PHYSICAL REVIEW B, 44 (10). pp. 5190-5208. ISSN 0163-1829Full text not available from this repository.
We have developed a method for studying superconductivity in the negative-U Hubbard model. It is based on the Hubbard-alloy-analogy approximation applied to the Gor'kov equation for the model. We find that, unlike the case of the BCS solution, the formation of pairs and their condensation into a super-conducting ground state take place at two different temperatures. We calculate the condensation temperature T(c) for all U and discuss the nature of the normal state which, for large enough U, features a macroscopically large number of pairs. Briefly, we argue that the model has relevance for high-temperature superconductors.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||PHYSICAL REVIEW B|
|Publisher:||AMERICAN PHYSICAL SOC|
|Official Date:||1 September 1991|
|Number of Pages:||19|
|Page Range:||pp. 5190-5208|
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