Spin-Triplet Vortex State in the Topological Superconductor CuxBi2Se3

Details Spin-Triplet Vortex State in the Topological Superconductor CuxBi2Se3 Spin-Triplet Vortex State in the Topological Superconductor CuxBi2Se3

2011-06-22

arxiv.org/abs/1106.4405v1

Phys. Rev. B 83, 220513(R) (2011)

Physics

Condensed Matter

Superconductivity

11 pages, 4 figures, to be published in PRB Rapid Communications

Scientific paper

We report on the observation of bulk superconductivity from dc magnetization measurements in a cylindrical single crystal of CuxBi2Se3. 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 Hc1 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 CuxBi2Se3 is consistent with the spin-triplet pairing superconductivity with odd parity. We also observed a rapid relaxation phenomenon of the superconducting diamagnetism.

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