Determination of the incommensurate modulated structure of Bi(2)Sr(1.6)La(0.4)CuO(6+δ) by aberration-corrected transmission electron microscopy.
The incommensurate modulated structure (IMS) of Bi2Sr1.6La0.4CuO6+δ (BSLCO) has been studied by aberration-corrected transmission electron microscopy in combination with a high-dimensional (HD) space description. Two images are deconvoluted in the negative Cs imaging (NCSI) and positive Cs imaging (PCSI) modes. Similar results for the IMS have been obtained from two corresponding projected potential maps (PPMs), and the size of the dots representing atoms in the NCSI PPM is found to be smaller than that in the PCSI PPM. Considering that the object size is one of the factors that influence the precision of the structural determination, modulation functions for all unoverlapped atoms in BSLCO were determined on the basis of the NCSI PPM in combination with the HD space description.
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: bhge@iphy.ac.cn.
Binghui
B
Ge
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Yumei
Y
Wang
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Huiqian
H
Luo
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Haihu
H
Wen
Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 100084, China.
Rong
R
Yu
Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 100084, China.
Zhiying
Z
Cheng
Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 100084, China.
Jing
J
Zhu
Aberration-corrected transmission electron microscopy; High-dimensional space description; Image deconvolution; Incommensurate modulated structure; Negative Cs imaging