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Bipolaron dispersion in anisotropic high-Tc superconductors: Relevance to neutron scattering

โœ Scribed by J. Tempere; V.M. Fomin; J.T. Devreese

Book ID
104166984
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
451 KB
Volume
101
Category
Article
ISSN
0038-1098

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โœฆ Synopsis

Neutron scattering experiments on superconducting YBa$usO6+x reveal that the scattering vanishes for energy transfers above approximately 50 meV. In order to examine Alexandrov's suggestion [l] that the disappearance of magnetic scattering is due to the narrowness of the bipolaron band, we present a variational method which can be used to investigate the bipolaron energy dispersion in anisotropic materials. The method is then applied to a model of bipolarons in Y13azCu307 and a value for the bipolaron energy bandwidth is found compatible with that derived from neutron scattering experiments.

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