Spin-triplet vortex state in the topological superconductor CuxBi2Se3

Pradip Das; Yusuke Suzuki; Masashi Tachiki; Kazuo Kadowaki

doi:10.1103/PhysRevB.83.220513

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Spin-triplet vortex state in the topological superconductor CuxBi2Se3

Pradip Das, Yusuke Suzuki, Masashi Tachiki, Kazuo Kadowaki

DOI 10.1103/PhysRevB.83.220513 · Physical Review B

T1

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Abstract

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Cu0.15Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3.6	Pressure not reported	onset
CuxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown