期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 81, 期 5, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.81.053701
关键词
superconductivity; IrTe2; Pt doping; triangular lattice; phase diagram; structural phase transition
资金
- Japan Society for the Promotion of Science (JSPS) [23740274]
- Grants-in-Aid for Scientific Research [23740274, 24740238] Funding Source: KAKEN
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 x(c) similar or equal to 0.035. Although both IrTe2 and PtTe2 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 Ir1-xPtxTe2. This result indicates that structural fluctuations can be involved in the emergence of superconductivity.
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