Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2

Details Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2 Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2

2012-04-06

arxiv.org/abs/1204.1421v1

J. Phys. Soc. Jpn. 81 (2012) 053701

Physics

Condensed Matter

Superconductivity

10 pages, 4 figures

Scientific paper

10.1143/JPSJ.81.053701

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.

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