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
刊名	MATERIALS RESEARCH BULLETIN
	2017
卷号	90 页码:1-7
关键词	Sr2iro4 X-ray Absorption Spectroscopy a Critical Point Local Structure
ISSN号	0025-5408
DOI	10.1016/j.materresbull.2017.02.013
文献子类	期刊论文
英文摘要	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.
语种	英语
WOS记录号	WOS:000401218400001
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/27241]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
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.,...&Xu, W.(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.