Determination of incommensurate modulated structure in   Bi2Sr1.6La0.4CuO6+{\delta} by aberration-corrected transmission electron   microscopy
  Incommensurate modulated structure (IMS) in Bi2Sr1.6La0.4CuO6+{\delta} (BSLCO) has been studied by aberration corrected transmission electron microscopy in combination with high-dimensional (HD) space description. Two images in the negative Cs imaging (NCSI) and passive Cs imaging (PCSI) modes were deconvoluted, respectively. Similar results as to IMS have been obtained from two corresponding projected potential maps (PPMs), but meanwhile the size of dots representing atoms in the NCSI PPM is found to be smaller than that in PCSI one. Considering that size is one of influencing factors of precision, modulation functions for all unoverlapped atoms in BSLCO were determined based on the PPM obtained from the NCSI image in combination with HD space description. 
Binghui Ge, Yumei Wang, Fanghua Li, Huiqian Luo, Haihu Wen, Rong Yu,   Zhiying Cheng, Jing Zhu
cond-mat.mtrl-sci