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Spin-triplet superconducting state in the nearly ferromagnetic compound UTe<sub>2</sub>

Invited

Abstract

Our recent discovery of the novel spin-triplet superconductivity in UTe2 has inspired a lot of interests in the community. Superconducting state of UTe2 closely resembles that of ferromagnetic superconductors, but the normal state is paramagnetic and shows no indication of magnetic ordering. UTe2 exhibits an extremely large, anisotropic upper critical field Hc2, temperature independent NMR Knight shift in the superconducting state, and a large residual normal electronic density of states. All these results strongly indicate that the superconductivity in UTe2 is carried by spin-triplet pairs. Even more striking, superconductivity reenters in the magnetic field of 45 tesla and persists up to 65 tesla, which is the upper limit of magnetic field in our current study. These extreme properties reflect a new kind of exotic superconductivity rooted in magnetic fluctuations and quantum dimensionality.

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Presenters

  • 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

Authors

  • 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