Evolution of incommensurate superstructure and electronic structure with Pb substitution in (Bi<sub>2−<i>x</i></sub>Pb<sub><i>x</i></sub>)Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+<i>δ</i></sub> 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, ‡}

Transport and magnetic properties of Pb-Bi2212 single crystals with various Pb contents. (a)–(d) Temperature dependence of DC magnetization measured under a magnetic field of 1 Oe for Pb-Bi2212 with different Pb contents. The onset superconducting transition temperature is marked in the figures. (e) Temperature dependence of AC magnetization of the same samples in (a)–(d). (f) Temperature dependence of the in-plane resistivity of Pb-Bi2212 single crystals with different Pb contents. The curves are normalized by the value at the temperature of 400 K. The bottom-left inset shows the measured superconducting transition temperature (T_c) of Pb-Bi2212 single crystals from (a)–(d) DC magnetization, (e) AC magnetization, and (f) resistivity measurements.