Normal-state properties of ABa2Cu3O7-y compounds (A=Y and Gd): Electron-electron correlations

S. W. Cheong, S. E. Brown, Z. Fisk, R. S. Kwok, J. D. Thompson, E. Zirngiebl, G. Gruner, D. E. Peterson, G. L. Wells, R. B. Schwarz, J. R. Cooper

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Abstract

Resistivity, thermoelectric power, Hall effect, and magnetic susceptibility measurements are reported in the normal state of the high-Tc compounds YBa2Cu3O7-y and GdBa2Cu3O7-y. The results are different from those expected for an uncorrelated metallic band. We suggest that Coulomb interactions are important and that the interaction energy is comparable to or larger than the uncorrelated bandwidth, leading to moderately heavy-fermion-like behavior in the normal state. The Sommerfeld coefficient calculated from the susceptibility indicates that the electron-phonon coupling constant at Tc is not unusually large.

Original languageEnglish (US)
Pages (from-to)3913-3916
Number of pages4
JournalPhysical Review B
Volume36
Issue number7
DOIs
StatePublished - 1987

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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