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

Kazushige Machida·Tetsuo Ohmi
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Abstract

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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Kazushige Machida, Tetsuo Ohmi. 1998-02-26. Identification of Non-unitary triplet pairing in a heavy Fermion superconductor UPt_3. https://doi.org/10.1143/jpsj.67.1122

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