Impurities and orbital-dependent superconductivity in Sr2RuO4

Authors
Citation
Df. Agterberg, Impurities and orbital-dependent superconductivity in Sr2RuO4, PHYS REV B, 60(2), 1999, pp. R749-R752
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
2
Year of publication
1999
Pages
R749 - R752
Database
ISI
SICI code
0163-1829(19990701)60:2<R749:IAOSIS>2.0.ZU;2-X
Abstract
There now exists a wealth of experimental evidence that Sr2RuO4 is an odd-p arity superconductor. Experiments further indicate that among the bands ste mming from the Ru {xy,xz,yz} orbitals, the portion of the Fermi surface ari sing from the xy orbitals exhibits a much larger gap than the portions of t he Fermi surface arising from the {xz,yz} orbitals. In this paper the role of impurities in such an orbital-dependent superconducting state is examine d within the Born approximation. In contrast to expected results for a node less p-wave superconductor, the unique nature of the superconducting state in Sr2RuO4 implies that a low concentration of impurities strongly influenc es the low-temperature behavior.