Abstract
We report on the observation of bulk superconductivity from dc magnetization measurements in a cylindrical single crystal of CuBiSe. The magnitude of the magnetization in the Meissner state is very small, and the magnetic-field dependence of the magnetization just above the lower critical field is very different from those of usual type-II superconductors. We studied the character of the vortex state theoretically in a spin-triplet pairing superconductor and compared it with the experimental results. The results showed that the superconductivity observed in CuBiSe is consistent with the spin-triplet pairing superconductivity with odd parity. We also observed a rapid relaxation phenomenon of the superconducting diamagnetism.
- Received 29 March 2011
DOI:https://doi.org/10.1103/PhysRevB.83.220513
©2011 American Physical Society
Synopsis
Odd topological superconductor
Published 23 June 2011
Experiments indicate that electrons pair in a spin-triplet state in the superconducting state of the topological insulator .
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