Raman scattering study of vibrational and magnetic excitations in Sr2-xLaxIrO4
SCIE
SCOPUS
- Title
- Raman scattering study of vibrational and magnetic excitations in Sr2-xLaxIrO4
- Authors
- Gretarsson, H.; Sauceda, J.; Sung, N. H.; Hoppner, M.; Minola, M.; Kim, B. J.; Keimer, B.; Le Tacon, M.
- Date Issued
- 2017-09
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We have measured the doping and temperature dependence of lattice vibrations and magnetic excitations in the prototypical doped spin-orbit Mott insulator Sr2-xLaxIrO4 (x = 0, 0.015, and 0.10). Our findings show that the pseudospin-lattice coupling-responsible for the renormalization of several low energy phonon modes-is preserved even when long-range magnetic order is suppressed by doping. In our most highly doped sample, the singlemagnon (Gamma point) excitation disappears while the two-magnon mode softens and becomes heavily damped. Doping-induced electron-phonon coupling is also observed in a higher energy phonon mode. We observe two different electron-phonon interaction channels, which provide evidence of the coexistence of fluctuating magnetic moments and mobile carriers in doped iridates.
- Keywords
- SR2IRO4
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92023
- DOI
- 10.1103/PhysRevB.96.115138
- ISSN
- 2469-9950
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 96, no. 11, 2017-09
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- There are no files associated with this item.
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