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La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy
Cheng, J; Sun, XY; Liu, SL; Li, B; Wang, HY; Dong, P; Wang, Y; Xu, W; Li, B (reprint author), Nanjing Univ Posts & Telecommun, Coll Sci, Ctr Adv Funct Ceram, Nanjing 210023, Jiangsu, Peoples R China.; Liu, SL (reprint author), Nanjing Univ, Suzhou High Tech Inst, Suzhou 215123, Peoples R China.
2016
Source PublicationNEW JOURNAL OF PHYSICS
ISSN1367-2630
Volume18Pages:-
Subtype期刊论文
AbstractSr2IrO4 was predicted to be an unconventional superconductor upon carrier doping since it highly resembles the high-temperature cuprates. Here, to understand carrier doping effect on spin-orbit coupled Mott insulator Sr2IrO4, the electronic structure and local structure distortion for Sr2-xLaxIrO4 system have been investigated by x-ray absorption spectroscopy. By comparing the intensity of white-line features at the Ir L-2,L-3 absorption edges, we observe remarkably large branching ratios in La-doped compounds, greater than that of the parent material Sr2IrO4, suggesting a strong spin-orbit interaction for Sr2IrO4-based system. Moreover, extended x-ray absorption fine structure spectra demonstrate more regular IrO6 octahedra, i.e. the weakened crystal electric field versus La-doping. By theoretical calculations, the synergistic effect of regular IrO6 octahedra and electron doping is established, which accounts for the transition from a Mott insulator to a conductive state in Sr2-xLaxIrO4-based system.
Keyword5d Transition Metal Oxides Spin-orbit Interaction Crystal Electric Field Xas
DOI10.1088/1367-2630/18/9/093019
Indexed BySCI
Language英语
WOS IDWOS:000384093400004
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/26557
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorCheng, J; Liu, SL; Li, B (reprint author), Nanjing Univ Posts & Telecommun, Coll Sci, Ctr Adv Funct Ceram, Nanjing 210023, Jiangsu, Peoples R China.; Liu, SL (reprint author), Nanjing Univ, Suzhou High Tech Inst, Suzhou 215123, Peoples R China.
Recommended Citation
GB/T 7714
Cheng, J,Sun, XY,Liu, SL,et al. La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy[J]. NEW JOURNAL OF PHYSICS,2016,18:-.
APA Cheng, J.,Sun, XY.,Liu, SL.,Li, B.,Wang, HY.,...&Liu, SL .(2016).La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy.NEW JOURNAL OF PHYSICS,18,-.
MLA Cheng, J,et al."La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy".NEW JOURNAL OF PHYSICS 18(2016):-.
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