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- Sohn, Chang Hee
- Laboratory for Unobtainable Functional Oxides
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X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr2IrO4
- Author(s)
- Sohn, C. H., Cho, Deok-Yong, Kuo, C. -T., Sandilands, L. J., Qi, T. F., Cao, G., Noh, T. W.
- Issued Date
- 2016-03
- Citation
- SCIENTIFIC REPORTS, v.6, pp.23856
- Abstract
- We investigate the effect of Rh doping in Sr2IrO4 using X-ray absorption spectroscopy (XAS). We observed appearance of new electron-addition states with increasing Rh concentration (x in Sr2Ir1-xRhxO4) in accordance with the concept of hole doping. The intensity of the hole-induced state is however weak, suggesting weakness of charge transfer (CT) effect and Mott insulating ground states. Also, Ir J(eff) = 1/2 upper Hubbard band shifts to lower energy as x increases up to x = 0.23. Combined with optical spectroscopy, these results suggest a hybridisation-related mechanism, in which Rh doping can weaken the (Ir J(eff) = 1/2)-(O 2p) orbital hybridisation in the in-planar Rh-O-Ir bond networks.
- Publisher
- NATURE PUBLISHING GROUP
- ISSN
- 2045-2322
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