X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr2IrO4

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Title
X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr2IrO4
Author(s)
Chang Hee Sohn; Deok Yong Cho; Cheng-Tai Kuo; Luke James Sandilands; Qi T.F.; Cao G.; Taewon Noh
Publication Date
2016-03
Journal
SCIENTIFIC REPORTS, v.6, no., pp.23856 -
Publisher
NATURE PUBLISHING GROUP
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-x RhxO4) 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 Jeff = 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 Jeff = 1/2)-(O 2p) orbital hybridisation in the in-planar Rh-O-Ir bond networks.
URI
https://pr.ibs.re.kr/handle/8788114/2683
ISSN
2045-2322
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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