期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 72, 期 6, 页码 1322-1325出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.72.1322
关键词
H-c2 anisotropy; unconventional superconductor; pairing function; PrOs4Sb12
Superconducting double transition in PrOs4Sb12 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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