Anomalous longitudinal nuclear spin relaxation in TlBa2(Ca,Y) Cu2O7 at the non-superconducting phase boundary

Yuuji Kunii, Takao Suzuki, Takayuki Goto, Satoru Nakajima

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Tl-based high-TC cuprate TlBa2Ca1-xY xCu2O7 (Tl1212) shows an anomalous electronic phase diagram, in which the non-superconducting phase persists on hole doping until x = 0.6 where TC abruptly jumps to 96 K. Around the critical hole concentration, Tl nuclear relaxation curves follow a so-called stretched-exponential function, suggesting that the doped holes are localized in small islands. This microscopic inhomogeneity in hole distribution is considered to be the origin of anomalous suppression of the superconductivity in the lightly doped region.

Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Issue numberSUPPL. 1
Publication statusPublished - 2004 May
Externally publishedYes



  • NMR
  • Tl-based high-T cuprate

ASJC Scopus subject areas

  • Condensed Matter Physics

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