Evolution of incommensurate superstructure and electronic structure with Pb substitution in (Bi2−xPbx)Sr2CaCu2O8+δ superconductors
Liu Jing1, 2, Zhao Lin1, †, Gao Qiang1, 2, Ai Ping1, 2, Zhang Lu1, 2, Xie Tao1, 2, Huang Jian-Wei1, 2, Ding Ying1, 2, Hu Cheng1, 2, Yan Hong-Tao1, 2, Song Chun-Yao1, 2, Xu Yu1, 2, Li Cong1, 2, Cai Yong-Qing1, 2, Rong Hong-Tao1, 2, Wu Ding-Song1, 2, Liu Guo-Dong1, Wang Qing-Yan1, Huang Yuan1, Zhang Feng-Feng3, Yang Feng3, Peng Qin-Jun3, Li Shi-Liang1, 2, 5, Yang Huai-Xin1, 2, Li Jian-Qi1, 2, 5, Xu Zu-Yan3, Zhou Xing-Jiang1, 2, 4, 5, ‡
       

Pb-substituted Bi2212 single crystals and their structure characterization. (a) Photos of Pb-Bi2212 single crystals cleaved from as-grown ingots with various nominal compositions. (b) XRD patterns for cleaved Pb-Bi2212 single crystals with different Pb contents. The top-left inset shows the expanded (008) peak to highlight the peak width and its position variation with Pb content. The measured c-axis lattice constant is shown in the top-right inset.