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 language | English |
---|---|
Pages (from-to) | 9203-9208 |
Number of pages | 6 |
Journal | Physical Review B |
Volume | 39 |
Issue number | 13 |
DOIs | |
Publication status | Published - 1989 |
ASJC Scopus subject areas
- Condensed Matter Physics