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Studies of the Non-Centrosymmetric Superconductor ThIrSi using <sup>29</sup>Si NMR

ORAL

Abstract

Non-centrosymmetric superconductors have stirred interest in the last number of years due to their unique characteristics. Broken inversion symmetry combined with spin-orbit coupling breaks the spin degeneracy of the Fermi surface, and allows for mixed parity superconductivity. ThIrSi possesses a non-centrosymmetric structure and demonstrates a superconducting transition temperature of 6.4K, higher than its analog compounds ThCoSi, ThNiSi, and ThPtSi. Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for condensed matter systems, primarily through measurements of the spin-lattice relaxation T1 and the Knight shift. In superconductors, NMR is particularly useful to determine the nature of the superconducting gap as well as provide evidence for spin-triplet superconductivity. We discuss our NMR results on the superconductor ThIrSi by measuring the 29Si spin-1/2 resonance.

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Presenters

  • Seth Blackwell

    Los Alamos National Laboratory

Authors

  • Seth Blackwell

    Los Alamos National Laboratory

  • Frederico Benedetto Santos

    Los Alamos National Laboratory

  • Priscila Rosa

    Los Alamos National Lab, Los Alamos National Laboratory, Quantum Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

  • Sean Thomas

    Los Alamos National laboratory, Los Alamos National Laboratory

  • Eric D Bauer

    Los Alamos National Laboratory, Los Alamos National Lab, Los Alamos National laboratory, Los Alamos Natl Lab, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, Los Alamos National LAborator

  • Joe Thompson

    Los Alamos National Lab, Los Alamos National laboratory, Los Alamos National Laboratory

  • Filip Ronning

    Los Alamos National Lab, Los Alamos National Laboratory, Los Alamos National laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory