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arXiv · 1204.1421

Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2

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.

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Sunseng Pyon, Kazutaka Kudo, Minoru Nohara. 2012-04-06. Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2. https://doi.org/10.1143/jpsj.81.053701

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