Characterizations of Anisotropic Superconductivity in (BiSe)1+δNbSe2

Anisotropy of superconductivity in misfit layered compounds (BiSe)1+δNbSe2 was studied. We synthesized single crystals of (BiSe)1+δNbSe2 using CsCl/KCl flux method. There existed two phases with different Tc depending on the starting composition δ, although their structures were almost unaffected by...

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Bibliographic Details
Published in:Journal of physics. Conference series 2022-08, Vol.2323 (1), p.012008
Main Authors: Matsuzawa, S, Pyon, S, Tamegai, T
Format: Article
Language:English
Subjects:
Anisotropy
Critical field (superconductivity)
Physics
Single crystals
Superconductivity
Two dimensional models
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Summary:Anisotropy of superconductivity in misfit layered compounds (BiSe)1+δNbSe2 was studied. We synthesized single crystals of (BiSe)1+δNbSe2 using CsCl/KCl flux method. There existed two phases with different Tc depending on the starting composition δ, although their structures were almost unaffected by changing δ. Anisotropy of the upper critical field was determined by magneto-resistance measurements with various out-of-plane and in-plane field angles. The out-of-plane anisotropy of Hc2 showed a cusp-like behavior for fields close to ab-plane similar to that predicted by 2D Tinkham model. Furthermore, a clear two-fold symmetry was observed in the in-plane angular dependence of Hc2.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2323/1/012008