Absence of Magnetic Pair Breaking in Zn-Doped YBa2Cu3O7

Authors

R. E. Walstedt, University of Michigan, Ann ArborFollow
R. F. Bell, LucentFollow
Lynn Schneemeyer, Montclair State UniversityFollow
Joseph V. Waszczak, University of WashingtonFollow
William W. Warren, Oregon State UniversityFollow
R. Dupree, University of Warwick
Azmi Gencten, Ondokuz Mayis University

Document Type

Article

Publication Date

1-1-1993

Journal / Book Title

Physical Review B

Abstract

Cu63(2) NMR linewidths in Zn-doped YBa2Cu3O7 exhibit a predominant component proportional to T-1 in the normal state. We attribute this result to spin-exchange scattering of carriers from localized moments associated with Zn impurities in the CuO2 planes. The estimated moment-carrier exchange, Jeff=20 meV, is more than an order of magnitude too small to account for the suppression of Tc in this system via Abrikosov-Gorkov pair breaking. A suggested alternative explanation is pair breaking by strong potential scattering from the Zn impurity sites which requires d-wave pairing.

DOI

10.1103/PhysRevB.48.10646

Montclair State University Digital Commons Citation

Walstedt, R. E.; Bell, R. F.; Schneemeyer, Lynn; Waszczak, Joseph V.; Warren, William W.; Dupree, R.; and Gencten, Azmi, "Absence of Magnetic Pair Breaking in Zn-Doped YBa2Cu3O7" (1993). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 96.
https://digitalcommons.montclair.edu/chem-biochem-facpubs/96