Identification of Non-unitary triplet pairing in a heavy Fermion superconductor UPt_3

Details Identification of Non-unitary triplet pairing in a heavy Fermion superconductor UPt_3 Identification of Non-unitary triplet pairing in a heavy Fermion superconductor UPt_3

1998-02-26

arxiv.org/abs/cond-mat/9802280v1

J. Phys. Soc. Jpn. 67, 1122 (1998).

Physics

Condensed Matter

4 pages, 2 eps figures, to be published in J. Phys. Soc. Jpn. 67 (1998) No.4

Scientific paper

10.1143/JPSJ.67.1122

A NMR experiment recently done by Tou et al. on a heavy Fermion superconductor UPt$_3$ is interpreted in terms of a non-unitary spin-triplet pairing state which we have been advocating. The proposed state successfully explains various aspects of the seemingly complicated Knight shift behaviors probed for major orientations, including a remarkable d-vector rotation under weak fields. This entitles UPt$_3$ as the first example that a charged many body system forms a spin-triplet odd-par ity pairing at low temperatures and demonstrates unambiguously that the putative spin-orbit coupling in UPt$_3$ is weak.

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