Enhanced insulating behavior in the Ir-vacant Sr2Ir1-xO4 system dominated by the local structuredistortion

doi:10.1107/S1600577518005799

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Enhanced insulating behavior in the Ir-vacant Sr2Ir1-xO4 system dominated by the local structuredistortion
	Cheng, J ; Dong, P ; Li, B ; Liu, SL ; Wang, XF ; Wang, Y ; Li, XA
刊名	JOURNAL OF SYNCHROTRON RADIATION
	2018
卷号	25 期号:-页码:1123-1128
关键词	SUPERCONDUCTIVITY TRANSITION SR2IRO4
ISSN号	1600-5775
DOI	10.1107/S1600577518005799
文献子类	期刊论文
英文摘要	Sr2IrO4, known as the J(eff) = 1/2 Mott insulator, was predicted to be an unconventional superconductor upon doping since it highly resembles the high-temperature cuprates. However, recent work pointed out an enhanced insulating behavior in the Ir-vacant Sr2Ir1-xO4 system. In this contribution, to investigate the microscopic mechanism of its enhanced insulating behavior, X-ray absorption spectroscopy was applied to study the electronic structure and local structure distortion of Sr2Ir1-xO4. Due to the presence of Ir5+ ions, the preconceived holes are barely doped in the Ir-vacant system. Nevertheless, Ir vacancies finely modulate the local atomic structure, i.e. the topology of IrO6 octahedra and the in-plane IrO1Ir bond angle. Combined with theoretical calculations, it is demonstrated that both the more distorted IrO6 octahedra and decreased IrO1Ir angle contribute to the increment of the band gap, and then result in the enhanced insulating state for Sr2Ir1-xO4.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/30934]
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
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 2.Nanjing Univ Posts & Telecommun, Sch Sci, New Energy Technol Engn Lab Jiangsu Prov, Nanjing 210023, Jiangsu, Peoples R China 3.Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Jiangsu, Peoples R China 4.Nanjing Univ Suzhou, High Tech Inst, Suzhou 215123, Peoples R China
推荐引用方式 GB/T 7714	Cheng, J,Dong, P,Li, B,et al. Enhanced insulating behavior in the Ir-vacant Sr2Ir1-xO4 system dominated by the local structuredistortion[J]. JOURNAL OF SYNCHROTRON RADIATION,2018,25(-):1123-1128.
APA	Cheng, J.,Dong, P.,Li, B.,Liu, SL.,Wang, XF.,...&Li, XA.(2018).Enhanced insulating behavior in the Ir-vacant Sr2Ir1-xO4 system dominated by the local structuredistortion.JOURNAL OF SYNCHROTRON RADIATION,25(-),1123-1128.
MLA	Cheng, J,et al."Enhanced insulating behavior in the Ir-vacant Sr2Ir1-xO4 system dominated by the local structuredistortion".JOURNAL OF SYNCHROTRON RADIATION 25.-(2018):1123-1128.