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Georgia Journal of Science

Article Title

THEORY OF MULTI-BAND INDIRECT K-EDGE BIMAGNON RIXS

Abstract

Magnetic correlations can give rise to two electron spin-flip (bimagnon) excitations in a quantum Heisenberg magnet. In recent years Resonant Inelastic X-ray Scattering (RIXS) has emerged as a powerful spectroscopic technique to study elementary excitations, including bimagnon processes, across the entire Brillouin zone in strongly correlated materials. Utilizing linear spin wave theory, I will describe our research effort to compare and contrast the results of the RIXS response of a bicollinear antiferromagnet (FeTe) and the block collinear antiferromagnet (K2Fe4Se5) system, respectively. We will highlight the various features of the intraband and interband RIXS scattering channels, including the presence or absence of multi-peak structures. The number of peaks provide a clue on the various bimagnon excitation processes that can be supported both in and within the acoustic and optical magnon branches present in the material.

Acknowledgements

Augusta University Provost Funding

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