Terahertz spin-orbital excitations in the paramagnetic state of multiferroic Sr2FeSi2O7
SCIE
SCOPUS
- Title
- Terahertz spin-orbital excitations in the paramagnetic state of multiferroic Sr2FeSi2O7
- Authors
- Mai, Thuc T.; Svoboda, C.; Warren, M. T.; Jang, TH; Brangham, J; Jeong, YH; Cheong, SW; Aguilar, RV
- Date Issued
- 2016-12-16
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We studied the novel multiferroic material Sr2FeSi2O7 and found three absorption modes above the magnetic ordering transition temperature using time-domain terahertz spectroscopy. These absorption modes can be explained as the optical transitions between the spin-orbit coupling and crystal-field split 3d(6) Fe2+ ground-state term in this material. Consideration of the compressed tetrahedral environment of the Fe2+ site is crucial to understand the excitations. We point out, however, discrepancies between the single-site atomic picture and the experimental results.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/38026
- DOI
- 10.1103/PHYSREVB.94.224416
- ISSN
- 2469-9950
- Article Type
- Article
- Citation
- Physical Review b, vol. 94, no. 22, page. 224416-1 - 224416-5, 2016-12-16
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