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Multi-component superconducting order parameter in UTe2

Invited

Abstract

Topological superconductivity holds great promise both as a trove of new physics and a source of powerful applications. However, progress in the field has been limited by a shortage of candidate materials. The recently discovered triplet superconducting state of UTe2 has generated great excitement for this reason, and motivated a careful study of the superconducting order parameter in this system. This talk will present specific heat data that shows that UTe2 actually possesses two nearly coincident superconducting transitions, indicating that the superconducting order parameter is multi-component. Through a detailed study of the evolution of these two transitions under applied magnetic fields along all three crystal axes, we have been able to deduce important constraints on the symmetry properties of the order parameter. On the basis of this analysis I will discuss the prospects for topological superconductivity in UTe2 as well as possible explanations for the presence of two nearly degenerate superconducting order parameters.

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Presenters

  • Ian Hayes

    Quantum Materials Center, Department of Physics, University of Maryland College Park, University of California, Berkeley, University of Maryland, College Park

Authors

  • Ian Hayes

    Quantum Materials Center, Department of Physics, University of Maryland College Park, University of California, Berkeley, University of Maryland, College Park

  • Tristin Metz

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

  • Yun Suk Eo

    University of Maryland, College Park, Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park, Quantum Materials Center, University of Maryland, College Park

  • John Collini

    Quantum Materials Center, Department of Physics, University of Maryland College Park, University of Maryland, College Park, Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park

  • Shanta Saha

    Quantum Materials Center, Department of Physics, University of Maryland College Park, University of Maryland, College Park, Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park

  • Sheng Ran

    National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, University of Maryland, College Park, Quantum Materials Center, Department of Physics, University of Maryland College Park, Physics, Washington University in St. Louis, Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park, Department of Physics and Astronomy, University of Maryland, College Park, Washington University, Physics Department, Washington University in St. Louis, NIST Center for Neutron Research, National Institute of Standards and Technology, Washington University in St. Louis, Department of Physics, University of California, San Diego, University of Maryland, College Park

  • Daniel Agterberg

    University of Wisconsin - Milwaukee, Department of Physics, University of Wisconsin, Milwaukee

  • Nicholas Butch

    National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, Center for Neutron Research, National Institute of Standards and Technology, NCNR, National Institute for Standard and Technology, NIST/University of Maryland, Center of Neutron Research, National Institute of Standards and Technology, NIST, Center for Neutron Research, National Institute of Standards and Technology, National Institute of Standards and Technology, NIST Center for Neutro Research, National Institute of Standards and Technology, University of Maryland

  • Johnpierre Paglione

    University of Maryland, College Park, Maryland Quantum Materials Center, Department of Physics, University of Maryland, Quantum Materials Center, Department of Physics, University of Maryland College Park, Quantum Materials Center, University of Maryland, College Park, Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park, University of Maryland