Electric-field-gradient–tensor study inYBa2Cu3O7−δhigh-Tcsuperconductors

1 April 1988

journal article
Published by American Physical Society (APS) in Physical Review B

Vol. 37 (10) , 5928-5931
https://doi.org/10.1103/physrevb.37.5928

Abstract

Electric-field-gradient– (EFG-) tensor components, at all the nine nonequivalent sites in the unit cell of YBa2Cu3O7−δ superconductors have been calculated on the basis of the point-charge model. Vzz, the principal EFG components and η, the asymmetry parameters at two nonequivalent Cu sites, have also been evaluated as a function of δ. The data reveal several new features of the EFG components in these superconductors and provides a new interpretation for the recently reported Mössbauer and nuclear quadruple resonance spectroscopic results.

Keywords

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