Matthew Staab, University of California, Davis

Abstract:

LaNiGa2 is a time-reversal-symmetry-breaking superconductor below 2K – a rare variant of superconductivity with promise as a platform for more robust quantum computing. Recently, large platelet-style single crystal specimens have clarified the crystal structure which in turn predicts a novel electronic structure with Fermi surface degeneracies on one plane of the Brillouin zone. In this work, we use angle-resolved photoemission spectroscopy at SSRL beamline 5-2 to probe this degenerate plane. Enabled by the small size of the beam spot from the beamline, we probe the thin (~0.2mm) edge of the crystal in addition to the large (~3mm)
platelet face. These multiple orientations provide a complete and clear view of the fermiology of LaNiGa2, shining light on the stage on which this strange superconductivity plays out.

Poster Session Link: https://gather.town/invite?token=0pEoq7VP

If you have any questions for the presenter, please contact them via email: mcstaab@ucdavis.edu