Strong magnetic instability in correlated metallic Bi 2Ir 2O 7

T. F. Qi, O. B. Korneta, Xiangang Wan, L. E. Delong, P. Schlottmann, G. Cao

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53 Scopus citations

Abstract

We report an experimental/theoretical study of single-crystal Bi 2Ir 2O 7 that possesses a metallic state with strongly exchange-enhanced paramagnetism. The ground state of Bi 2Ir 2O 7 is characterized by the following features: (1) a divergent low-temperature magnetic susceptibility that indicates no long-range order down to 50mK; (2) strongly field-dependent coefficients of the low-temperature T and T 3 terms of the specific heat; (3) a conspicuously large Wilson ratio R W53.5; and (4) unusual temperature and field dependences of the Hall resistivity that abruptly change below 80K, without any clear correlation with the magnetic behavior. All these unconventional properties suggest the existence of an exotic ground state in Bi 2Ir 2O 7.

Original languageEnglish
Article number345601
JournalJournal of Physics Condensed Matter
Volume24
Issue number34
DOIs
StatePublished - Aug 29 2012

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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