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An Optical Investigation of the normal state of UTe<sub>2</sub>

ORAL

Abstract

The recently discovered unconventional superconductor, UTe2, has attracted immense scientific interest due to the experimental observations that suggest spin-triplet pairing. The normal state of UTe2 behaves like a Kondo lattice metal. Here, we have studied the optical properties of the normal state of UTe2 at frequencies between 10cm-1 and 8500 cm-1 and temperatures between 5 and 290 K using conventional Fourier Transform Infrared Reflectivity. From the measured reflectivity, we have directly determined the complex optical conductivity. The frequency dependence of the real part of the optical conductivity show maximum peaks around 4000cm-1with the 50 K revealing the highest conductivity. DFT + DMFT calculations supports the experimental findings and attribute the optical conductivity to an intra-band transitions of a coherent U 5f feature near the Fermi level.

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Presenters

  • Sirak Mekonen

    Department of Physics and Astronomy, Johns Hopkins University

Authors

  • Sirak Mekonen

    Department of Physics and Astronomy, Johns Hopkins University

  • Chang-Jong Kang

    Department of Physics and Astronomy, Rutgers University, Rutgers University, New Brunswick

  • Dipanjan Chaudhuri

    Department of Physics and Astronomy, Johns Hopkins University

  • David Barbalas

    Johns Hopkins University, Department of Physics and Astronomy, Johns Hopkins University

  • 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

  • Gabriel Kotliar

    Rutgers University, New Brunswick, Rutgers University, USA, Department of Physics and Astronomy, Rutgers University, Rutgers University and Brookhaven National Laboratories

  • 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

  • Peter Armitage

    Johns Hopkins University, Department of Physics and Astronomy, Johns Hopkins University, Baltimore 21218, Department of Physics and Astronomy, Johns Hopkins University