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Nuclear magnetic resonance studies of local magnetism and spin dynamics in UTe<sub>2</sub>

ORAL

Abstract

The newly-discovered heavy-fermion superconductor UTe2 is a candidate triplet superconductor. Its superconductivity resembles that of the other ferromagnetic superconductors such as UCoGe, whereas its magnetism significantly differs in the sense that there is no ferromagnetic order. Results from experiments carried out under hydrostatic pressure are taken as evidence for magnetically ordered phases. These high-pressure phases are likely antiferromagnetic, although their local spin structures and dynamics are not yet clear. Further, their relation to the pressure-enhanced superconducting transition temperature TC and impacts on the normal-state magnetic fluctuations are unknown. Using 125Te nuclear magnetic resonance (NMR), we will discuss local magnetism and spin dynamics in  UTe2 on 125Te-enriched high-quality single crystals.

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Presenters

  • Riku Yamamoto

    Los Alamos National Laboratory

Authors

  • Riku Yamamoto

    Los Alamos National Laboratory

  • Michihiro Hirata

    Los Alamos National Lab, Los Alamos Natinal Laboratory

  • Priscila Rosa

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

  • 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

  • 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

  • Joe D Thompson

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

  • Ajeesh Mukkattu Omanakuttan

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

  • Stuart E Brown

    University of California, Los Angeles, UCLA