Multi-spinon and antiholon excitations probed by resonant inelastic x-ray scattering on doped one-dimensional antiferromagnets

Umesh Kumar, Alberto Nocera, Elbio Dagotto, Steve Johnston

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16 Scopus citations

Abstract

Resonant inelastic x-ray scattering (RIXS) at the oxygen K-edge has recently accessed multi-spinon excitations in the one-dimensional antiferromagnet (1D-AFM) Sr2CuO3, where four-spinon excitations are resolved separately from the two-spinon continuum. This technique, therefore, provides new opportunities to study fractionalized quasiparticle excitations in doped 1D-AFMs. To this end, we carried out exact diagonalization studies of the doped t-J model and provided predictions for oxygen K-edge RIXS experiments on doped 1D-AFMs. We show that the RIXS spectra are rich, containing distinct two- and four-spinon excitations, dispersive antiholon excitations, and combinations thereof. Our results highlight how RIXS complements inelastic neutron scattering experiments by accessing additional charge and spin components of fractionalized quasiparticles.

Original languageEnglish
Article number073019
JournalNew Journal of Physics
Volume20
Issue number7
DOIs
StatePublished - Jul 2018
Externally publishedYes

Keywords

  • 1D strongly correlated systems
  • antiferromagnetism
  • holon
  • spinon

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