Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2

Sunseng Pyon; Kazutaka Kudo; Minoru Nohara

doi:10.1143/JPSJ.81.053701

Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2

Superconductivity 2012-04-09 v1

Authors: Sunseng Pyon , Kazutaka Kudo , Minoru Nohara

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Abstract

IrTe2, 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 Ir1-xPtxTe2 results in the appearance of a structural critical point in the T = 0 limit at xc = 0.035. Although both IrTe2 and PtTe2 are paramagnetic metals, superconductivity at Tc = 3.1 K is induced by the bond breaking in a narrow range of x > xc in Ir1-xPtxTe2. This result indicates that structural fluctuations can be involved in the emergence of superconductivity.

Keywords

IrTe2 superconductivity bond breaking structural phase transition triangular lattice structural fluctuations critical point

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@article{arxiv.1204.1421,
  title  = {Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2},
  author = {Sunseng Pyon and Kazutaka Kudo and Minoru Nohara},
  journal= {arXiv preprint arXiv:1204.1421},
  year   = {2012}
}

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10 pages, 4 figures

Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2

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