Title
Possible (bi) polaron effects in the high-<tex>$t_{c}$</tex> superconductors
Author
Faculty/Department
Faculty of Sciences. Physics
Faculty of Social Sciences. Sociology
Publication type
article
Publication
Stockholm :Royal Swedish Acad. Sciences ,
Subject
Physics
Source (journal)
Physica scripta. - Stockholm
Source (book)
11TH General Conf. Of the Condensed Matter Division of the European Physical Society, April 08-11, 1991, Exeter, England
Volume/pages
T39(1991) , p. 66-70
ISSN
0031-8949
ISI
A1991GV57300008
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In the present paper, the theory of the large bipolaron is reviewed and the possibility of bipolaron formation in the high-T(c) superconductors is indicated. Operator and path-integral formulations of the large bipolaron problem are compared. In the strong-coupling limit, the effect of non-optimal upper-bounds to the single-polaron groundstate energy is emphasized. The fact that the interaction with multiple phonon branches enhances the electron-phonon interaction and might result in a larger stability region for bipolaron formation is indicated. Experimental values for the static and high-frequency dielectric constants are used to discuss the relevance of bipolaron formation as a pair-forming mechanism in the high-T(c) superconductors.
E-info
https://repository.uantwerpen.be/docman/iruaauth/89fdd6/0f32378.pdf
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