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Progress on photoemission studies of nodal plane in LaNiGa<sub>2</sub>

ORAL

Abstract

LaNiGa2 is a time-reversal-symmetry-breaking superconductor below 2K. Recently, large platelet-style single crystal specimens have clarified the space group for the crystal structure which in turn predicts a novel electronic structure with Fermi surface degeneracies on one plane of the Brillouin zone. While the large platelet face of the crystals is most accessible to photoemission studies, the predicted degeneracies are on a plane orthogonal to the platelet face, making it difficult to probe with angle resolved photoemission spectroscopy (ARPES). In this talk we will present progress on accessing the predicted electronic degeneracies in LaNiGa2 directly with ARPES.

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Publication: Jackson R. Badger, Yundi Quan, Matthew C. Staab, Shuntaro Sumita, Antonio Rossi, Kasey P. Devlin, Kelly Neubauer, Daniel S. Shulman, James C. Fettinger, Peter Klavins, Susan M. Kauzlarich, Dai Aoki, Inna M. Vishik, Warren E. Pickett, Valentin Taufour "Dirac lines and loop at the Fermi level in the Time-Reversal Symmetry Breaking Superconductor LaNiGa$ _2$." arXiv preprint arXiv:2109.06983 (2021).

Presenters

  • Matthew C Staab

    University of California, Davis, University of California Davis

Authors

  • Matthew C Staab

    University of California, Davis, University of California Davis

  • Eliana Mann

    University of California, Davis

  • Jackson R Badger

    University of California, Davis

  • Yundi Quan

    University of California, Davis, University of Florida

  • Warren E Pickett

    University of California, Davis

  • Valentin Taufour

    University of California, Davis, University of California Davis

  • Inna Vishik

    University of California, Davis