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A critical point in Sr2-xIrO4and less distorted IrO6octahedra induced by deep Sr-vacancies
Cheng, Jie1; Zhu, Chaomin2; Liu, Shengli1,3; Li, Bin1; Wang, Haiyun1; Wang, Yu4; Xu, Wei5,6
2017
Source PublicationMaterials Research Bulletin
ISSN00255408
Volume90Pages:1-7
AbstractFor the Sr2-xIrO4system, recent work pointed out the abnormal electronic and magnetic properties around a critical point. Here, to understand Sr-vacancy effect on spin-orbit coupled Mott insulator Sr2IrO4, the electronic structure and local structure distortion for Sr2-xIrO4system have been investigated by x-ray absorption spectroscopy (XAS). By comparing the intensity of white-line features at the Ir L2,3-edge x-ray absorption near-edge spectroscopy (XANES), we observe a sudden rise of the branching ratio in the vicinity of the critical point. Further analysis on the Ir L3-edge extended x-ray absorption fine structure (EXAFS) and calculated data demonstrated that the abrupt enhancement of the branching ratio is intimately related to the less distorted IrO6octahedra induced by deep Sr-vacancies, which in turn alters the relatively strength of the spin-orbit coupling (SOC) and crystal electric field (CEF) that would dictate the abnormal behavior of electronic and magnetic structure near the critical point. © 2017 Elsevier Ltd
DOI10.1016/j.materresbull.2017.02.013
EI Accession Number20170703357954
EI KeywordsIridium compounds
EI Classification Number701.1 Electricity: Basic Concepts and Phenomena - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics - 933.1 Crystalline Solids - 933.1.1 Crystal Lattice
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25511
Collection中国科学院上海硅酸盐研究所
Affiliation1.College of Science, Center of Advanced Functional Ceramics, Nanjing University of Posts and Telecommunications, Nanjing; Jiangsu; 210023, China;
2.College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing; Jiangsu; 210023, China;
3.Nanjing University (Suzhou) High-Tech Institute, Suzhou; 215123, China;
4.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai; 201204, China;
5.Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China;
6.Rome International Center for Materials Science, Superstripes, RICMASS, via dei Sabelli 119A, I-00185, Roma, Italy
Recommended Citation
GB/T 7714
Cheng, Jie,Zhu, Chaomin,Liu, Shengli,et al. A critical point in Sr2-xIrO4and less distorted IrO6octahedra induced by deep Sr-vacancies[J]. Materials Research Bulletin,2017,90:1-7.
APA Cheng, Jie.,Zhu, Chaomin.,Liu, Shengli.,Li, Bin.,Wang, Haiyun.,...&Xu, Wei.(2017).A critical point in Sr2-xIrO4and less distorted IrO6octahedra induced by deep Sr-vacancies.Materials Research Bulletin,90,1-7.
MLA Cheng, Jie,et al."A critical point in Sr2-xIrO4and less distorted IrO6octahedra induced by deep Sr-vacancies".Materials Research Bulletin 90(2017):1-7.
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