Confinement of fractional excitations in the 3D Kitaev magnet β-Li2IrO3

ORAL

Abstract

Kitaev quantum spin liquid (QSL) is a highly frustrated state in topological magnets with excitations from fractional particles. In candidate materials like RuCl3 and A2IrO3(A = Na, Li), there is always an ordered state below Tc. However, the transition from spin liquid like fractional excitations to the magnons of the ordered state is still unclear. Here, we report the Raman scattering result on three-dimensional magnet β-Li2IrO3. We identified the polarization and temperature dependence of the magnons and fractional excitations in Raman. This provides first direct evidence for confinement of fractional excitations into magnons in a kitaev system, which so far has only been observed in quasi-1d systems.

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Presenters

  • Yiping Wang

    Boston College, Boston college

Authors

  • Yiping Wang

    Boston College, Boston college

  • Alejandro Ruiz

    University of California, San Diego, Physics, university of Califonia San Digo

  • James Analytis

    University of California, Berkeley, Department of Physics, University of California, Berkeley, Physics, University of California Berkeley, Physics, University of California Berkerley, Physics, University of California, Berkeley, physics, University of California, Berkeley

  • Kenneth Burch

    Boston College, Boston college