Absence of magnetic pair breaking in Zn-doped YBa2Cu3O7

Walstedt R., Bell R., Schneemeyer L., Waszczak J., Warren Jr. W., Dupree R., ...Daha Fazla

Physical Review B, cilt.48, sa.14, ss.10646-10649, 1993 (Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 48 Sayı: 14
  • Basım Tarihi: 1993
  • Doi Numarası: 10.1103/physrevb.48.10646
  • Dergi Adı: Physical Review B
  • Derginin Tarandığı İndeksler: Scopus
  • Sayfa Sayıları: ss.10646-10649
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

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. © 1993 The American Physical Society.