Absence of magnetic pair breaking in Zn-doped ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$

1 October 1993

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 48 (14), 10646-10649
https://doi.org/10.1103/physrevb.48.10646

Abstract

{}^{63}{Cu}

(2) NMR linewidths in Zn-doped

{YBa}_{2}

{Cu}_{3}

O_{7}

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

{CuO}_{2}

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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Cited by 88 articles

Absence of magnetic pair breaking in Zn-doped YBa2Cu3O7

Abstract

Absence of magnetic pair breaking in Zn-doped ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$