Local structures around 3d metal dopants in topological insulator Bi2Se3 studied by EXAFS measurements

doi:10.1103/PhysRevB.90.094107

	Local structures around 3d metal dopants in topological insulator Bi2Se3 studied by EXAFS measurements
	Liu, Zhen 1,2; Wei, Xinyuan 1,2; Wang, Jiajia 1,2; Pan, Hong 1,2; Ji, Fuhao 1,2; Xi, Fuchun 1,2; Zhang, Jing 3; Hu, Tiandou 3; Zhang, Shuo 4; Jiang, Zheng 4; Wen, Wen 4; Huang, Yuying 4; Ye, Mao 5; Yang, Zhongqin 1,2; Qiao, Shan5,6
	2014-09-08
发表期刊	PHYSICAL REVIEW B
ISSN	1098-0121
卷号	90 期号:9
发表状态	已发表
DOI	10.1103/PhysRevB.90.094107
摘要	Transition-metal-doped Bi2Se3 crystals, X0.05Bi2Se3 (X = Cr, Co, Ni, and Cu), are prepared and studied by powder x-ray diffraction and extended x-ray absorption fine structure (EXAFS) measurements to get the local structures around the dopants. Cr atoms substitute Bi atoms and Co atoms may substitute Bi atoms or form Co3Se4 (C2/m) clusters. Cu is also found taking the Bi substitutional site, which differs from the reported superconductor phase of Cu-doped Bi2Se3, suggesting the dependence of site occupancy of Cu in Bi2Se3 on the process of sample growing. For Ni0.05Bi2Se3, Ni atoms form Ni3Se4 (C2/m) clusters. The nearest neighbors of X (X = Cr, Co, and Cu) are Se atoms, and the X-Se bond lengths are extracted from EXAFS as 2.50 angstrom for Cr-Se, 2.40 angstrom for Co-Se, and 2.38 angstrom for Cu-Se, which show the direct evidences of dramatic structural relaxations around 3d dopants. The bond information of local structures around dopants is valuable for subsequent theoretical studies, and can hardly be obtained from other techniques.
收录类别	SCI
语种	英语
资助项目	Chinese Academy of Sciences[XDB04010100]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000341294600001
出版者	AMER PHYSICAL SOC
WOS关键词	TOTAL-ENERGY CALCULATIONS ; WAVE BASIS-SET ; CRYSTAL-STRUCTURES ; SEMICONDUCTORS ; TRANSITION ; SURFACE ; BI2TE3 ; PHASE ; CUSE2
原始文献类型	Article
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/2373
专题	物质科学与技术学院_特聘教授组_乔山组
通讯作者	Liu, Zhen
作者单位	1.Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China 2.Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Synchrotron Radiat Facil, Beijing 100039, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201800, Peoples R China 5.Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 6.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhen,Wei, Xinyuan,Wang, Jiajia,et al. Local structures around 3d metal dopants in topological insulator Bi2Se3 studied by EXAFS measurements[J]. PHYSICAL REVIEW B,2014,90(9).
APA	Liu, Zhen.,Wei, Xinyuan.,Wang, Jiajia.,Pan, Hong.,Ji, Fuhao.,...&Qiao, Shan.(2014).Local structures around 3d metal dopants in topological insulator Bi2Se3 studied by EXAFS measurements.PHYSICAL REVIEW B,90(9).
MLA	Liu, Zhen,et al."Local structures around 3d metal dopants in topological insulator Bi2Se3 studied by EXAFS measurements".PHYSICAL REVIEW B 90.9(2014).