Odd-Parity Superconductivity with Parallel Spin Pairing in UPt3: Evidence from 195Pt Knight Shift Study

H. Tou; Y. Kitaoka; K. Asayama; N. Kimura; Y. Ōnuki; E. Yamamoto; K. Maezawa

doi:10.1103/PhysRevLett.77.1374

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Odd-Parity Superconductivity with Parallel Spin Pairing in UPt3: Evidence from 195Pt Knight Shift Study

H. Tou, Y. Kitaoka, K. Asayama, N. Kimura, Y. Ōnuki, E. Yamamoto, K. Maezawa

DOI 10.1103/PhysRevLett.77.1374 · Physical Review Letters

T1

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Abstract

The temperature dependence of the 195Pt Knight shift, K, for the high quality single crystal UPt3 has been measured down to T=28mK in applied magnetic fields parallel and perpendicular to the hexagonal c axis. No change of K's has been found across the superconducting transition temperature Tc down to 28 mK regardless of the crystal directions and independent of the superconducting multiphases. It is demonstrated that UPt3 is the odd-parity superconductor with parallel spin pairing following the direction of the magnetic field in a range of 4.4–15.6 kOe without an appreciable pinning of the order parameter to the lattice.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.58	Pressure not reported	onset
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.53	Pressure not reported	midpoint