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Magnetic field induced spin liquids and quantum phase transitions in spin orbit coupled quantum magnets.

ORAL

Abstract

When an external magnetic field suppressed the magnetic ordering in spin-orbit coupled system, a new magnetic phase is often observed. For example, controversial theoretical and experimental results propose spin liquid behavior above in-plane 7 T where antiferromagnetic order is suppressed in a-RuCl3. Theoretical studies also show that out-of-plane magnetic field can induce spin liquid phase in this system as well. In this work, we present the analysis of inelastic neutron scattering data of a-RuCl3 and extracted g-factor and the Γ/J using linear spin wave theory. In addition, we present the out-of-plane pulsed field data of a-RuCl3 to study a new phases predicted by theoretical studies by drawing the full field vs temperature phase diagram. We also explore the how the magnetic field breaks the orbital assisted spin dimerized phase in one dimensional spin chains, and new magnetic phases are induced to discuss the role of the orbital degrees of freedom in rescale the Hund coupling and on-site interorbital Coulomb interactions in spin-orbit coupled systems.

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Presenters

  • Minseong Lee

    Los Alamos National Laboratory

Authors

  • Minseong Lee

    Los Alamos National Laboratory

  • Vivien Zapf

    NHMFL, Los Alamos National Laboratory, Los Alamos National Laboratory, National High Magnetic Field Laboratory, Los Alamos National Laboratory, National High Magnetic Field Lab, Los Alamos National Lab, Los Alamos Natl Lab

  • Haidong Zhou

    University of Tennessee, Department of Physics and Astronomy, University of Tennessee, Knoxville, University of Knoxville, Tennessee, Department of Physics & Astronomy, University of Tennessee, University of Tennesse, Knoxville, Physics and anstronomy, University of Tennessee, Department of Physics, University of Tennessee, Physics, University of Tennessee, Knoxville, University of Tennessee, Knoxville