Microscopic imaging of UTe<sub>2</sub> by scanning SQUID microscopy

ORAL

Abstract

Unconventional superconductor UTe2 is a newly-discovered candidate spin-triplet superconductor. A variety of exotic properties have been reported in UTe2, such as areentrant superconducting phase at high magnetic field, multiple phase transitions in the superconducting state, chiral edge modes, and time-reversal symmetry breaking. In addition, this material is drawing attention as a candidate for a chiral superconductor.  In order to explore multiple superconducting transitions,chiral superconductivity, and particularly the possible chiral edge current in this material, we measured the local magnetic susceptibility and local magnetic flux on single crystals of UTe2. In this talk, we discuss our results on the inhomogeneity of Tc, the superfluid density at low temperature, and the observation of spontaneous magnetic flux near the edge.

*This work was primarily supported by the Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DE-AC02-76SF00515. Work at Los Alamos was supported by the U.S. Department of Energy, Office of Basic Energy Sciences "Quantum Fluctuations in Narrow-Band Systems" program. H.M. was supported by the National Science Foundation under award ECCS-1542152. Y.I. was supported by the Japan Society for the Promotion of Science (JSPS), Overseas Research Fellowship.

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Presenters

  • Yusuke Iguchi

    • Geballe Laboratory for Advanced Materials, Stanford University
    • Stanford Univ
    • Stanford University

Authors

  • Yusuke Iguchi

    • Geballe Laboratory for Advanced Materials, Stanford University
    • Stanford Univ
    • Stanford University

  • Huiyuan Man

    • Geballe Laboratory for Advanced Materials, Stanford University
    • Stanford University

  • Sean M Thomas

    • Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
    • Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

  • Filip Ronning

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
    • Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

  • Priscila Rosa

    • Quantum Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory

  • Kathryn Moler

    • Department of Physics and Applied Physics, Stanford University
    • Stanford Univ
    • Stanford University
    • Department of Physics and Applied Physics, Stanford University, California 94305, USA