Bibliographic Details
| Title: |
The magnetic exciton of EuS revealed by resonant inelastic x-ray scattering |
| Authors: |
Amidani, Lucia, Joos, Jonas J., Glatzel, Pieter, Kolorenc, Jindrich |
| Source: |
Phys. Rev. Lett. 134, 046401 (2025) |
| Publication Year: |
2023 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| More Details: |
We report the valence-to-core resonant inelastic x-ray scattering (RIXS) of EuS measured at the L3 edge of Eu. The obtained data reveal two sets of excitations: one set is composed of a hole in the S 3p bands and an electron excited to extended Eu 5d band states, the other is made up from a hole in the Eu 4f states and an electron in localized Eu 5d states bound to the 4f hole by its Coulomb potential. The delocalized excitations arise from the dipole-allowed 5d to 2p emissions, whereas the localized excitations result from the dipole-forbidden (quadrupole-allowed) 4f to 2p emissions. Both these emission channels have a comparable intensity thanks to a small number of occupied 5d states (approximately 0.6) combined with a large number of occupied 4f states (seven). We identify the localized electron-hole pairs with the "magnetic excitons" suggested in the past as an interpretation of the sharp features seen in the optical absorption spectra. Our observations provide a direct experimental evidence of these excitons which has been missing up to now.
Comment: 7 pages, 4 figures, supplemental material (PDF, 8 pages) added as an ancillary file |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.134.046401 |
| Access URL: |
http://arxiv.org/abs/2310.18096 |
| Accession Number: |
edsarx.2310.18096 |
| Database: |
arXiv |
