ABSENCE OF MAGNETIC PAIR-BREAKING IN ZN-DOPED YBA2CU3O7

被引：93

作者：

WALSTEDT, RE

BELL, RF

SCHNEEMEYER, LF

WASZCZAK, JV

WARREN, WW

DUPREE, R

GENCTEN, A

机构：

[1] OREGON STATE UNIV,DEPT PHYS,CORVALLIS,OR 97331

[2] UNIV WARWICK,DEPT PHYS,COVENTRY CV4 7AL,W MIDLANDS,ENGLAND

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.48.10646

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cu-63(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, J(eff) = 20 meV, is more than an order of magnitude too small to account for the suppression of T(c) 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.

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页码：10646 / 10649

页数：4

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