Orbital-dependent polaron formation in the relativistic Mott insulator Sr2IrO4open access
- Authors
- Sohn, C. H.; Lee, Min-Cheol; Park, H. J.; Noh, Kyung Joo; Yoo, H. K.; Moon, Soon jae; Kim, K. W.; Qi, T. F.; Cao, G.; Cho, Deok-Yong; Noh, T. W.
- Issue Date
- Jul-2014
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.90, no.4, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 90
- Number
- 4
- Start Page
- 1
- End Page
- 5
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143355
- DOI
- 10.1103/PhysRevB.90.041105
- ISSN
- 2469-9950
- Abstract
- We use optical spectroscopy to investigate the electron-phonon interaction in Sr2IrO4, a well-known 5d transition metal oxide with spin-orbit entangled states. The temperature evolution in the optical spectra is well described by the Frohlich polaron model, indicating a large electron-phonon interaction. We further find that electrons in different orbitals selectively couple with different phonon modes. While J(eff) = 3/2 holes do not seem to couple with any phonons, J(eff) = 1/2 and 3z(2)-r(2) electrons mainly couple with in-plane and out-of-plane Ir-O bending modes, respectively. The symmetries of the orbitals and phonons are consistent with our observations.
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