An x-ray fluorescence holographic study on a Bi2Te3Mn0.1 topological insulator

1st Conference on Light and Particle Beams in Materials Science 2013

物理学;材料科学

Hosokawa, S.^1 ; Happo, N.^2 ; Hayashi, K.^3 ; Ohnishi, A.^4 ; Kitaura, M.^4 ; Sasaki, M.^4

Department of Physics, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan^1

Graduate School of Information Sciences, Hiroshima City University, Hiroshima 731-3194, Japan^2

Institute of Materials Research, Tohoku University, Sendai 980-8577, Japan^3

Department of Physics, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan^4

关键词: Atomic positions;    Atomic sites;    Functional crystals;    Hexagonal configuration;    Mn impurity;    Topological insulators;    X ray fluorescence;    X-ray holography;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/502/1/012024/pdf
DOI  :  10.1088/1742-6596/502/1/012024

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To search the atomic sites of Mn impurities in Bi2Te3Mn0.1 topological insulator, a Mn Kα fluorescence x-ray holography experiment was performed. The reconstructed atomic image around the central Mn atom reveals a hexagonal configuration, where the local lattice constant is slightly larger than the original Bi2Te3 crystal. Thus, the most plausible atomic position of Mn impurities is the substitution with Bi or Te atom. The further-distant atomic images are hardly observed unlike usual crystals, indicating a formation of flat clusters around Mn in this functional crystal.