A critical point in Sr2-xIrO4 and less distorted IrO6 octahedra induced by deep Sr-vacancies

doi:10.1016/j.materresbull.2017.02.013

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	A critical point in Sr2-xIrO4 and less distorted IrO6 octahedra induced by deep Sr-vacancies
	Cheng, J; Zhu, CM; Liu, SL; Li, B; Wang, HY; Wang, Y; Xu, W; Xu W(徐伟)
	2017
发表期刊	MATERIALS RESEARCH BULLETIN (IF:2.446[JCR-2016],2.365[5-Year])
ISSN	0025-5408
EISSN	1873-4227
卷号	90 页码:1-7
文章类型	Article
摘要	For the Sr(2-x)lrO(4) system, 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-xIrO4 system have been investigated by x-ray absorption spectroscopy (XAS). By comparing the intensity of white-line features at the Ir L-2,L-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 L-3-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 Iro(6) octahedra 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. (C) 2017 Elsevier Ltd. All rights reserved.
关键词	Sr2IrO4 X-ray absorption spectroscopy A critical point Local structure
DOI	10.1016/j.materresbull.2017.02.013
关键词[WOS]	SPIN-ORBIT INTERACTION ; SR2IRO4
收录类别	SCI ; EI ; SCOPUS
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000401218400001
EI入藏号	20170703357954
EI主题词	Crystal structure - Crystallography - Electric fields - Electronic structure - Extended X ray absorption fine structure spectroscopy - High energy physics - Mott insulators - Strontium compounds - Vacancies - X ray absorption spectroscopy
EI分类号	701.1 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
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/285203
专题	多学科研究中心
作者单位	中国科学院高能物理研究所
第一作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Cheng, J,Zhu, CM,Liu, SL,et al. A critical point in Sr2-xIrO4 and less distorted IrO6 octahedra induced by deep Sr-vacancies[J]. MATERIALS RESEARCH BULLETIN,2017,90:1-7.
APA	Cheng, J.,Zhu, CM.,Liu, SL.,Li, B.,Wang, HY.,...&徐伟.(2017).A critical point in Sr2-xIrO4 and less distorted IrO6 octahedra induced by deep Sr-vacancies.MATERIALS RESEARCH BULLETIN,90,1-7.
MLA	Cheng, J,et al."A critical point in Sr2-xIrO4 and less distorted IrO6 octahedra induced by deep Sr-vacancies".MATERIALS RESEARCH BULLETIN 90(2017):1-7.