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题名:
A critical point in Sr2-xIrO4 and less distorted IrO6 octahedra induced by deep Sr-vacancies
作者: Cheng, J; Zhu, CM; Liu, SL; Li, B; Wang, HY; Wang, Y; Xu, W
刊名: MATERIALS RESEARCH BULLETIN
出版日期: 2017
卷号: 90, 页码:1-7
关键词: Sr2IrO4 ; X-ray absorption spectroscopy ; A critical point ; Local structure
DOI: 10.1016/j.materresbull.2017.02.013
文章类型: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000401218400001
ISSN号: 0025-5408
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27241
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
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,2017-01-01,90:1-7.
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