Probing p - wave superconductivity in UTe2 via point-contact junctions

ORAL

Abstract

The evidence for odd-parity, spin-triplet superconductivity in uranium ditelluride (UTe2) has been observed in several experimental studies, yet the exact nature and symmetry of its superconductivity has remained elusive. Here, we perform a spectroscopic study of the ambient pressure superconducting phase of UTe2, measuring conductance through point-contact junctions formed by metallic contacts on different crystalline facets down to 250 mK and up to 18 T. We utilize Raman spectroscopy to study surface oxidation for different contact methods and identify a ballistic regime where differential conductance measurements can reliably probe the energy density of states. Comparing fits of conductance spectra with a Blonder-Tinkham-Klapwijk model for p-wave pairing, we will discuss implications for the pairing symmetry of UTe2.

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Presenters

  • Hyeok Yoon

    University of Maryland, College Park

Authors

  • Hyeok Yoon

    University of Maryland, College Park

  • Y. Eo

    Texas Tech University, Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • Jihun Park

    University of Maryland, College Park

  • Jarryd Horn

    University of Maryland, College Park

  • Ryan Dorman

    University of Maryland, College Park, University of Maryland, Collage Park

  • Shanta R Saha

    University of Maryland, College Park

  • Ian M Hayes

    University of Maryland

  • Ichiro Takeuchi

    University of Maryland

  • Johnpierre Paglione

    University of Maryland, College Park, Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA