Magnetization in the Superconducting State of UPt${}_3$ from Polarized Neutron Diffraction

Abstract

The heavy fermion superconductor UPt${}_3$ is thought to have odd-parity, a state for which the temperature dependence of the spin susceptibility is an important signature. In order to address conflicting reports from two different experiments, the NMR Knight shift and measurements of the anisotropy of the upper critical field, we have measured the bulk susceptibility in a high quality single crystal using polarized-neutron diffraction. A temperature independent susceptibility was observed for $H||a$ through the transitions between the normal state and the superconducting A-, B- and C-phases, consistent with odd-parity, spin-triplet superconductivity.

arXiv comment5 pages, 4 figures. Submitted to Physical Review Letters

References in corpus (6)

• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• The Order Parameter for the Superconducting Phases of UPt${}_3$
• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• A polarized neutron-scattering study of the Cooper-pair moment in Sr2RuO4
• Identification of the Orbital Pairing Symmetry in UPt_3
• Suppression of Superconductivity in UPt_3 Single Crystals

Cited by in corpus (4)

• Surface Cooper pair spin waves in triplet superconductors
• Spin Susceptibility of the Topological Superconductor UPt3 from Polarized Neutron Diffraction
• Effects of the order parameter anisotropy on the vortex lattice in UPt3
• Towards a Microscopic Theory of the Knight Shift in an Anisotropic, Multiband Type-II Superconductor