Spin susceptibility of the topological superconductor UPt3 from polarized neutron diffraction

W. J. Gannon; W. P. Halperin; M. R. Eskildsen; Pengcheng Dai; U. B. Hansen; K. Lefmann; A. Stunault

doi:10.1103/PhysRevB.96.041111

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Spin susceptibility of the topological superconductor UPt3 from polarized neutron diffraction

W. J. Gannon, W. P. Halperin, M. R. Eskildsen, Pengcheng Dai, U. B. Hansen, K. Lefmann, A. Stunault

DOI 10.1103/PhysRevB.96.041111 · Physical Review B

T1

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Abstract

Experiment and theory indicate that UPt3 is a topological superconductor in an odd-parity state, based in part from the temperature independence of the NMR Knight shift. However, quasiparticle spin-flip scattering near a surface, where the Knight shift is measured, might be responsible. We use polarized neutron scattering to measure the bulk susceptibility with H∥c, finding consistency with the Knight shift but inconsistency with theory for this field orientation. We infer that neither spin susceptibility nor a Knight shift are a reliable indication of odd parity.

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.	0.56	Pressure not reported	unknown