TY - JOUR
T1 - Nonunitary spin-triplet superconductivity in UPt3
T2 - Evidence from 195Pt knight shift study
AU - Tou, H.
AU - Kitaoka, Y.
AU - Ishida, K.
AU - Asayama, K.
AU - Kimura, N.
AU - Nuki, Y. O.
AU - Yamamoto, E.
AU - Haga, Y.
AU - Maezawa, K.
PY - 1998
Y1 - 1998
N2 - 195Pt Knight shift (KS) measurements covering the superconducting multiple phases for major field (H) orientations have been carried out on the high-quality single crystal UPt3. For H > 5 kOe, the KS does not change below the superconducting transition temperature Tc down to 28 mK, regardless of major crystal orientations, which provides evidence that the odd-parity superconductivity with the parallel spin pairing is realized. By contrast, the KS decreases below Tc for Hb||b axis and Hb < 5 kOe and for Hc||c axis and Hc <.3 kOe, whereas the KS for HA||A axis is T independent across Tc down to Ha˜1.764 kOe. These novel findings entitle UPt3 as the first spin-triplet odd-parity superconductor including a nonunitary pairing characterized by the two-component d vector like db+idc at low T and low H.
AB - 195Pt Knight shift (KS) measurements covering the superconducting multiple phases for major field (H) orientations have been carried out on the high-quality single crystal UPt3. For H > 5 kOe, the KS does not change below the superconducting transition temperature Tc down to 28 mK, regardless of major crystal orientations, which provides evidence that the odd-parity superconductivity with the parallel spin pairing is realized. By contrast, the KS decreases below Tc for Hb||b axis and Hb < 5 kOe and for Hc||c axis and Hc <.3 kOe, whereas the KS for HA||A axis is T independent across Tc down to Ha˜1.764 kOe. These novel findings entitle UPt3 as the first spin-triplet odd-parity superconductor including a nonunitary pairing characterized by the two-component d vector like db+idc at low T and low H.
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U2 - 10.1103/PhysRevLett.80.3129
DO - 10.1103/PhysRevLett.80.3129
M3 - Article
AN - SCOPUS:0032489740
VL - 80
SP - 3129
EP - 3132
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
ER -