Vortex lattices and broken time reversal symmetry in the topological superconductor UPt3

K. E. Avers, W. J. Gannon, S. J. Kuhn, W. P. Halperin, J. A. Sauls, L. DeBeer-Schmitt, C. D. Dewhurst, J. Gavilano, G. Nagy, U. Gasser, M. R. Eskildsen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The topological superconductor UPt3, has three distinct vortex phases, a strong indication of its unconventional character. Using small-angle neutron scattering we have probed the vortex lattice in the UPt3 B phase with the magnetic field along the crystal c-axis. We find a difference in the vortex lattice configuration depending on the sign of the magnetic field relative to the field direction established upon entering the B phase at low temperature in a field sweep, showing that the vortices in this material posses an internal degree of freedom. This observation is facilitated by the discovery of a field driven non-monotonic vortex lattice rotation, driven by competing effects of the superconducting gap distortion and the vortex-core structure. From our bulk measurements we infer that the superconducting order parameter in the UPt3 B phase breaks time reversal symmetry and exhibits chiral symmetry with respect to the c-axis.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Dec 13 2018

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Vortex lattices and broken time reversal symmetry in the topological superconductor UPt<sub>3</sub>'. Together they form a unique fingerprint.

Cite this