Nodeless superconductivity in Ir1−xPtxTe2 with strong spin-orbital coupling
1 State Key Laboratory of Surface Physics, Department of Physics, and Laboratory of Advanced Materials, Fudan University - Shanghai 200433, PRC
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing 100190, PRC
Received: 28 August 2013
Accepted: 28 October 2013
The thermal conductivity κ of the superconductor Ir1−xPtxTe2 (x = 0.05) single crystal with strong spin-orbital coupling was measured down to 50 mK. The residual linear term is negligible in zero magnetic field. In low magnetic field, shows a slow field dependence. These results demonstrate that the superconducting gap of Ir1−xPtxTe2 is nodeless, and the pairing symmetry is likely a conventional s-wave, despite the existence of strong spin-orbital coupling and a quantum critical point.
PACS: 74.25.fc – Electric and thermal conductivity / 74.40.Kb – Quantum critical phenomena / 74.25.Op – Mixed states, critical fields, and surface sheaths
© EPLA, 2013