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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
2017
Source PublicationMATERIALS RESEARCH BULLETIN
ISSN0025-5408
Volume90Pages:1-7
Subtype期刊论文
AbstractFor 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.
KeywordSr2iro4 X-ray Absorption Spectroscopy a Critical Point Local Structure
DOI10.1016/j.materresbull.2017.02.013
Indexed BySCI
Language英语
WOS IDWOS:000401218400001
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/27241
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
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.
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