HOLE DELOCALIZATION BY ISOVALENT SR SUBSTITUTION IN ND0.7PR0.3BA2-KSRKCU3O7

Authors
ZELENAY I DAS A SURYANARAYANAN R
Citation
I. Zelenay et al., HOLE DELOCALIZATION BY ISOVALENT SR SUBSTITUTION IN ND0.7PR0.3BA2-KSRKCU3O7, Physics letters. A, 222(6), 1996, pp. 451-454
Citations number
29
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
222
Issue
6
Year of publication
1996
Pages
451 - 454
Database
ISI
SICI code
0375-9601(1996)222:6<451:HDBISS>2.0.ZU;2-R
Abstract
Thermopower measurements on the system Nd0.7Pr0.3Ba2-kSrkCu3O7 show th at the insulator-superconductor transition for k greater than or equal to 0.2 is accompanied by hole delocalization. Arguments are presented to show that Sr substitution reduces the hybridization between Pr 4f and O(2p pi-)orbitals and increases the hole density to sustain superc onductivity.