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손창희

Sohn, Chang Hee
Laboratory for Unobtainable Functional Oxides
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Orbital-dependent polaron formation in the relativistic Mott insulator Sr2IrO4

Author(s)
Sohn, C. H.Lee, Min-CheolPark, H. J.Noh, Kyung JooYoo, H. K.Moon, S. J.Kim, K. W.Qi, T. F.Cao, G.Cho, Deok-YongNoh, T. W.
Issued Date
2014-07
DOI
10.1103/PhysRevB.90.041105
URI
https://scholarworks.unist.ac.kr/handle/201301/26322
Fulltext
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.041105
Citation
PHYSICAL REVIEW B, v.90, no.4, pp.041105
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.
Publisher
AMER PHYSICAL SOC
ISSN
2469-9950
Keyword
TEMPERATUREPHONONPLANE

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