Evolution of incommensurate superstructure and electronic structure with Pb substitution in (Bi2−xPbx)Sr2CaCu2O8+δ superconductors

Evolution of incommensurate superstructure and electronic structure with Pb substitution in (Bi_2−xPb_x)Sr₂CaCu₂O_8+δ superconductors

Liu Jing^{1, 2}, Zhao Lin^{1, †}, Gao Qiang^{1, 2}, Ai Ping^{1, 2}, Zhang Lu^{1, 2}, Xie Tao^{1, 2}, Huang Jian-Wei^{1, 2}, Ding Ying^{1, 2}, Hu Cheng^{1, 2}, Yan Hong-Tao^{1, 2}, Song Chun-Yao^{1, 2}, Xu Yu^{1, 2}, Li Cong^{1, 2}, Cai Yong-Qing^{1, 2}, Rong Hong-Tao^{1, 2}, Wu Ding-Song^{1, 2}, Liu Guo-Dong¹, Wang Qing-Yan¹, Huang Yuan¹, Zhang Feng-Feng³, Yang Feng³, Peng Qin-Jun³, Li Shi-Liang^{1, 2, 5}, Yang Huai-Xin^{1, 2}, Li Jian-Qi^{1, 2, 5}, Xu Zu-Yan³, Zhou Xing-Jiang^{1, 2, 4, 5, ‡}

Evolution of superstructure bands with Pb substitution in Pb-Bi2212. Panles (a) and (b) compare MDCs along the nodal direction at the Fermi level for Pb-Bi2212 samples with different Pb contents measured by (a) 6.994 eV laser (like in Fig. 4) and (b) 10.897 eV laser (like in Fig. 5). The peaks of superstructure bands are marked with black short lines. (c) Variation of the determined Q vector with Pb content in Pb-Bi2212. Black circle and red cross are obtained from laser-ARPES measurements with 6.994 eV laser and 10.897 eV laser, respectively. Blue rectangular is obtained from TEM measurements (Fig. 3). Pink triangle is from TEM measurement in Ref. [40]. (d) Variation of superstructure band intensity with Pb content in Pb-Bi2212 measured by laser-ARPES with 6.994 eV laser (black dots) and 10.897 eV laser (red dots). The intensity is normalized to that of the main band.