High-temperature resistivity of RBa2Cu3O7-y, where R=La, Pr, Nd, Sm, Eu, Dy, Ho, Er, and Tm

H. C. Yang, M. H. Hsieh, H. H. Sung, C. H. Chen, H. E. Horng, Y. S. Kan, H. C. Chen, J. C. Jao

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Abstract

The electrical resistivity of RBa2Cu3O7-y, where R=La, Pr, Nd, Eu, Dy, Ho, Er, Sm, and Tm has been measured from room temperature up to 900 K. No essential difference in the transport properties was found except for LaBa2Cu3O7-y and PrBa2Cu3O7-y which shows an anomaly in the electrical resistivity. SmBa2Cu3O7-y samples with various oxygen contents are studied in detail. Metallic behavior and linear temperature dependence of have been found for SmBa2Cu3O7-y with 0<y<0.227. The linear temperature dependence of implies weak electron-phonon coupling, which suggests that other mechanisms for high-Tc superconductivity are needed.

Original languageEnglish
Pages (from-to)9203-9208
Number of pages6
JournalPhysical Review B
Volume39
Issue number13
DOIs
Publication statusPublished - 1989 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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