Indirect K-edge bimagnon resonant inelastic x-ray scattering spectrum of α-FeTe

Zengye Huang, Sean Mongan, Trinanjan Datta, Dao Xin Yao

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2 Scopus citations

Abstract

We calculate the K-edge indirect bimagnon resonant inelastic x-ray scattering (RIXS) intensity spectra of the bicollinear antiferromagnetic order known to occur in the α-FeTe chalcogenide system. Utilizing linear spin wave theory for this large-S spin system we find that the bimagnon spectrum contains four scattering channels (two intraband and two interband). We find from our calculations that for suitable energy-momentum combination the RIXS spectra can exhibit a one-, two- or three- peak structure. The number of peaks provides a clue on the various bimagnon excitation processes that can be supported both in and within the acoustic and optical magnon branches of the bicollinear antiferromagnet. Unlike the RIXS response of the antiferromagnetic or the collinear antiferromagnetic spin ordering, the RIXS intensity spectrum of the bicollinear antiferromagnet does not vanish at the magnetic ordering wave vector . It is also sensitive to next-next nearest neighbor and biquadratic coupling interactions. Our predicted RIXS spectrum can be utilized to understand the role of multi-channel bimagnon spin excitations present in the α-FeTe chalcogenide.

Original languageEnglish (US)
Article number505802
JournalJournal of Physics Condensed Matter
Volume29
Issue number50
DOIs
StatePublished - Nov 24 2017

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Keywords

  • bicollinear antiferromagnet
  • bimagnon
  • resonant inelastic x-ray scattering
  • α-FeTe

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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