NMR and NQR measurements in LaNiGa<sub>2</sub>

ORAL

Abstract

LaNiGa2 is a layered centrosymmetric superconductor with an orthorhombic crystal structure. ??SR experiments have observed spontaneous magnetic fields at the onset of superconducting state, implying time-reversal symmetry breaking and suggesting the possibility of triplet pairing. We report on NQR measurements performed on 139La down to dilution fridge temperatures showing a large shift to the spectrum in the superconducting state. We also report on continued normal state NMR measurements on 69Ga determining the anisotropy of the electric field gradient at the two 69Ga sites. These measurements are shown to be consistent with band structure calculations.

*UC Lab Fees

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Presenters

  • Phurba Sherpa

    • University of California, Davis

Authors

  • Phurba Sherpa

    • University of California, Davis

  • Igor Vinograd

    • Department of Physics, University of California Davis, Davis, CA
    • University of California, Davis

  • Michihiro Hirata

    • Los Alamos National Laboratory

  • Riku Yamamoto

    • Los Alamos National Laboratory

  • Jackson R Badger

    • University of California, Davis

  • Antia S Botana

    • Argonne National Laboratory
    • Arizona State University

  • Myung-Chul Jung

    • Arizona State University

  • Valentin Taufour

    • Department of Physics, University of California, Davis
    • University of California, Davis

  • Nicholas J Curro

    • Department of Physics, University of California Davis, Davis, CA
    • University of California, Davis