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Rotational isotropy breaking as proof for spin-polarized Cooper pairs in the topological superconductor CuxBi2Se3

Yuki Nagai, Hiroki Nakamura, Masahiko Machida
2012 Physical Review B  

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2012 pre-print arXiv:1206.0563v1 fatcat:j2b4llyph5fqzilm64ilabfos4

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2012 accepted
arXiv:1206.0563v2 fatcat:jcorymq2e5cpjbliyvmjduxzie
In a promising candidate of topological superconductors, CuxBi2Se3, we propose a way to exclusively determine the pairing symmetry. The proposal suggests that the angle dependence of the thermal conductivity in the basal ab-plane shows a distinct strong anisotropy only when the pairing symmetry is an odd-parity spin-polarized triplet below the superconducting transition temperature (Tc). Such striking isotropy breaking below Tc is explicitly involved in Dirac formalism for superconductors, in
more » ... ich the spin-orbit coupling is essential. We classify possible gap functions based on the Dirac formalism and clarify an origin of the isotropy breaking.
doi:10.1103/physrevb.86.094507 fatcat:aa5wogr6azcs3okrv2tyjalyxy
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Yuki Nagai, Hiroki Nakamura, Masahiko Machida. "Rotational isotropy breaking as proof for spin-polarized Cooper pairs in the topological superconductor CuxBi2Se3." Physical Review B 86.9 (2012)