On Superconducting Double Transition in PrOs_4_Sb_12

Details On Superconducting Double Transition in PrOs_4_Sb_12 On Superconducting Double Transition in PrOs_4_Sb_12

2003-04-24

arxiv.org/abs/cond-mat/0304538v1

J. Phys. Soc. Jpn. 72, 1322 (2003)

Physics

Condensed Matter

Superconductivity

4 pages, to be published in J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.72.1322

Superconducting double transition in PrOs_4_Sb_12 is investigated by analyzing the anisotropy of the upper critical field H_c2 in the ab-plane, and the possible pairing state is discussed. When mixing due to gradient coupling is active, the twofold-symmetric component is necessarily induced in the fourfold symmetric phase, leading to the twofold oscillation of H_c2, contrary to the experimental result. To avoid the mixing effect, the weak spin-orbit coupling triplet pairing state is considered as a likely pairing function, where time-reversal symmetry is broken.

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