Spin Susceptibility of the Topological Superconductor UPt3 from Polarized Neutron Diffraction

Abstract

Experiment and theory indicate that UPt3 is a topological superconductor in an odd-parity state, based in part from 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 inconsistent with theory for this field orientation. We infer that neither spin susceptibility nor Knight shift are a reliable indication of odd-parity.

References in corpus (11)

• Non-abelian statistics of half-quantum vortices in p-wave superconductors
• Search for Majorana fermions in superconductors
• The Order Parameter for the Superconducting Phases of UPt${}_3$
• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• Observation of broken time-reversal symmetry in the heavy fermion superconductor UPt${}_3$
• A polarized neutron-scattering study of the Cooper-pair moment in Sr2RuO4
• Twofold spontaneous symmetry breaking in a heavy fermion superconductor UPt${}_3$
• A Spin Triplet Superconductor UPt${}_3$
• Identification of the Orbital Pairing Symmetry in UPt_3
• Suppression of Superconductivity in UPt_3 Single Crystals
• Magnetization in the Superconducting State of UPt${}_3$ from Polarized Neutron Diffraction

Cited by in corpus (2)

• Resonance from antiferromagnetic spin fluctuations for superconductivity in UTe${}_2$
• Spin susceptibility of superconductors with strong spin-orbit coupling