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On Superconducting Double Transition in PrOs_4_Sb_12

Masanori Ichioka·Noriyuki Nakai·Kazushige Machida
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Abstract

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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Masanori Ichioka, Noriyuki Nakai, Kazushige Machida. 2003-04-24. On Superconducting Double Transition in PrOs_4_Sb_12. https://doi.org/10.1143/jpsj.72.1322

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