Superconductivity induced by bond breaking in the triangular lattice of IrTe 2

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Abstract

IrTe 2, a layered compound with a triangular iridium lattice, exhibits a structural phase transition at approximately 250 K. This transition is characterized by the formation of Ir-Ir bonds along the b-axis. We found that the breaking of Ir-Ir bonds that occurs in Ir 1-xPt xTe 2 results in the appearance of a structural critical point in the T - 0 limit at x c ≲ 0.035. Although both IrTe 2 and PtTe 2 are paramagnetic metals, superconductivity at T c - 3.1 K is induced by the bond breaking in a narrow range of x ≥ x c in Ir 1-xPt xTe 2. This result indicates that structural fluctuations can be involved in the emergence of superconductivity.

Original languageEnglish
Article number053701
Journaljournal of the physical society of japan
Volume81
Issue number5
DOIs
Publication statusPublished - May 2012

Keywords

  • IrTe
  • Phase diagram
  • Pt doping
  • Structural phase transition
  • Superconductivity
  • Triangular lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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