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Visualization of Isospin Momentum Texture of Dirac Magnons and Excitons in a Honeycomb Quantum Magnet

ORAL

Abstract

Band topology in electronic systems is known to have profound consequences on various observable properties in semi-metals and certain insulators. Insights from this field have reached into many areas of physics and in this talk we describe certain universal signatures of band topology in propagating bosonic quasi-particles. We show that the Dirac magnon material CoTiO3 provides an experimental demonstration of a universal winding of the inelastic neutron scattering intensity around linear touching points of magnetic excitations - magnons and spin-orbit excitons - that originates from the isospin texture of the quasiparticle wavefunction in momentum space. https://arxiv.org/abs/2007.04199

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Presenters

  • Miska Elliot

    Clarendon Laboratory, University of Oxford

Authors

  • Miska Elliot

    Clarendon Laboratory, University of Oxford

  • Paul McClarty

    Max Planck Institute for the Physics of Complex Systems

  • Dharmalingam Prabhakaran

    Clarendon Laboratory, University of Oxford

  • Roger D Johnson

    University College London, Department of Physics and Astronomy, University College London

  • Helen Walker

    ISIS Pulsed Neutron and Muon Source, ISIS Facility, Rutherford Appleton Laboratory

  • Pascal Manuel

    Rutherford Appleton Lab, Rutherford Appleton Laboratory, STFC, Rutherford Appleton Lab, ISIS, Rutherford Appleton Laboratory, ISIS Pulsed Neutron and Muon Facility, STFC Rutherford Appleton Laboratory, ISIS Facility, Rutherford Appleton Laboratory

  • Radu Coldea

    University of Oxford, Clarendon Laboratory, University of Oxford, Clarendon Laboratory, Oxford University