The symmetry of the order parameter in highly overdoped Bi2Sr2CaCu2O8+x

Authors
Vobornik, I Gatt, R Schmauder, T Frazer, B Kelley, RJ Kendziora, C Grioni, M Onellion, M Margaritondo, G
Citation
I. Vobornik et al., The symmetry of the order parameter in highly overdoped Bi2Sr2CaCu2O8+x, PHYSICA C, 318, 1999, pp. 589-591
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
318
Year of publication
1999
Pages
589 - 591
Database
ISI
SICI code
0921-4534(199905)318:<589:TSOTOP>2.0.ZU;2-8
Abstract
We report results of an angle-resolved high-resolution photoemission study of strongly overdoped Bi2Sr2CaCu2O8+x single crystals with T-c similar to 6 0 K. We find a nonzero superconducting (SC) gap along all three high symmet ry directions in the Brillouin zone, in contrast with a d-wave scenario of high temperature superconductivity. Our data indicate that both the maximum gap value and the gap anisotropy decrease with overdoping. (C) 1999 Elsevi er Science B.V. All rights reserved.