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

C. H. Sohn; Deok Yong Cho; C. T. Kuo; L. J. Sandilands; T. F. Qi; G. Cao; T. W. Noh

doi:10.1038/srep23856

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

C. H. Sohn
, Deok Yong Cho^*
, C. T. Kuo
, L. J. Sandilands
, T. F. Qi
, G. Cao
, T. W. Noh

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

17 Scopus citations

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 Sr₂Ir_1-x Rh_xO₄) 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.

Original language	English
Article number	23856
Journal	Scientific Reports
Volume	6
DOIs	https://doi.org/10.1038/srep23856
State	Published - 2016.03.30

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@article{381e7fd2b0ce4da5ab3ee78195661678,

title = "X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr2IrO4",

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.",

author = "Sohn, \{C. H.\} and Cho, \{Deok Yong\} and Kuo, \{C. T.\} and Sandilands, \{L. J.\} and Qi, \{T. F.\} and G. Cao and Noh, \{T. W.\}",

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day = "30",

doi = "10.1038/srep23856",

language = "English",

volume = "6",

journal = "Scientific Reports",

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TY - JOUR

T1 - X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr2IrO4

AU - Sohn, C. H.

AU - Cho, Deok Yong

AU - Kuo, C. T.

AU - Sandilands, L. J.

AU - Qi, T. F.

AU - Cao, G.

AU - Noh, T. W.

PY - 2016/3/30

Y1 - 2016/3/30

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84962359319

U2 - 10.1038/srep23856

DO - 10.1038/srep23856

M3 - Journal article

AN - SCOPUS:84962359319

SN - 2045-2322

VL - 6

JO - Scientific Reports

JF - Scientific Reports

M1 - 23856

ER -

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

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