中国物理B ›› 2019, Vol. 28 ›› Issue (7): 77403-077403.doi: 10.1088/1674-1056/28/7/077403

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

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

Jing Liu(刘静), Lin Zhao(赵林), Qiang Gao(高强), Ping Ai(艾平), Lu Zhang(张璐), Tao Xie(谢涛), Jian-Wei Huang(黄建伟), Ying Ding(丁颖), Cheng Hu(胡成), Hong-Tao Yan(闫洪涛), Chun-Yao Song(宋春尧), Yu Xu(徐煜), Cong Li(李聪), Yong-Qing Cai(蔡永青), Hong-Tao Rong(戎洪涛), Ding-Song Wu(吴定松), Guo-Dong Liu(刘国东), Qing-Yan Wang(王庆艳), Yuan Huang(黄元), Feng-Feng Zhang(张丰丰), Feng Yang(杨峰), Qin-Jun Peng(彭钦军), Shi-Liang Li(李世亮), Huai-Xin Yang(杨槐馨), Jian-Qi Li(李建奇), Zu-Yan Xu(许祖彦), Xing-Jiang Zhou(周兴江)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    5 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 收稿日期:2019-05-23 修回日期:2019-05-25 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Lin Zhao, Xing-Jiang Zhou E-mail:lzhao@iphy.ac.cn;XJZhou@iphy.ac.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300300 and 2017YFA0302900), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant Nos. XDB07020300 and XDB25000000), the National Natural Science Foundation of China (Grant Nos. 11334010 and 11534007), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2017013).

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

Jing Liu(刘静)1,2, Lin Zhao(赵林)1, Qiang Gao(高强)1,2, Ping Ai(艾平)1,2, Lu Zhang(张璐)1,2, Tao Xie(谢涛)1,2, Jian-Wei Huang(黄建伟)1,2, Ying Ding(丁颖)1,2, Cheng Hu(胡成)1,2, Hong-Tao Yan(闫洪涛)1,2, Chun-Yao Song(宋春尧)1,2, Yu Xu(徐煜)1,2, Cong Li(李聪)1,2, Yong-Qing Cai(蔡永青)1,2, Hong-Tao Rong(戎洪涛)1,2, Ding-Song Wu(吴定松)1,2, Guo-Dong Liu(刘国东)1, Qing-Yan Wang(王庆艳)1, Yuan Huang(黄元)1, Feng-Feng Zhang(张丰丰)3, Feng Yang(杨峰)3, Qin-Jun Peng(彭钦军)3, Shi-Liang Li(李世亮)1,2,5, Huai-Xin Yang(杨槐馨)1,2, Jian-Qi Li(李建奇)1,2,5, Zu-Yan Xu(许祖彦)3, Xing-Jiang Zhou(周兴江)1,2,4,5   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    5 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • Received:2019-05-23 Revised:2019-05-25 Online:2019-07-05 Published:2019-07-05
  • Contact: Lin Zhao, Xing-Jiang Zhou E-mail:lzhao@iphy.ac.cn;XJZhou@iphy.ac.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300300 and 2017YFA0302900), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant Nos. XDB07020300 and XDB25000000), the National Natural Science Foundation of China (Grant Nos. 11334010 and 11534007), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2017013).

摘要:

High-quality Bi2-xPbxSr2CaCu2O8+δ (Bi2212) single crystals have been successfully grown by the traveling solvent floating zone technique with a wide range of Pb substitution (x=0-0.8). The samples are characterized by transmission electron microscope (TEM) and measured by high resolution laser-based angle-resolved photoemission spectroscopy (ARPES) with different photon energies. A systematic evolution of the electronic structure and superstructure with Pb substitution has been revealed for the first time. The superstructure shows a significant change with Pb substitution and the incommensurate modulation vector (Q) decreases with increasing Pb substitution. In the meantime, the superstructure intensity from ARPES measurements also decreases dramatically with increasing Pb concentration. The superstructure in Bi2212 can be effectively suppressed by Pb substitution and it nearly disappears with a Pb substitution of x=0.8. We also find that the superstructure bands in ARPES measurements depend sensitively on the photon energy of lasers used; they can become even stronger than the main band when using a laser photon energy of 10.897 eV. These results provide important information on the origin of the incommensurate superstructure and its control and suppression in bismuth-based high temperature superconductors.

关键词: Bi2-xPbxSr2CaCu2O8+δ, superstructure, electronic structure, angle-resolved photoemission spectroscopy (ARPES), modulation

Abstract:

High-quality Bi2-xPbxSr2CaCu2O8+δ (Bi2212) single crystals have been successfully grown by the traveling solvent floating zone technique with a wide range of Pb substitution (x=0-0.8). The samples are characterized by transmission electron microscope (TEM) and measured by high resolution laser-based angle-resolved photoemission spectroscopy (ARPES) with different photon energies. A systematic evolution of the electronic structure and superstructure with Pb substitution has been revealed for the first time. The superstructure shows a significant change with Pb substitution and the incommensurate modulation vector (Q) decreases with increasing Pb substitution. In the meantime, the superstructure intensity from ARPES measurements also decreases dramatically with increasing Pb concentration. The superstructure in Bi2212 can be effectively suppressed by Pb substitution and it nearly disappears with a Pb substitution of x=0.8. We also find that the superstructure bands in ARPES measurements depend sensitively on the photon energy of lasers used; they can become even stronger than the main band when using a laser photon energy of 10.897 eV. These results provide important information on the origin of the incommensurate superstructure and its control and suppression in bismuth-based high temperature superconductors.

Key words: Bi2-xPbxSr2CaCu2O8+δ, superstructure, electronic structure, angle-resolved photoemission spectroscopy (ARPES), modulation

中图分类号:  (Electronic structure (photoemission, etc.))

  • 74.25.Jb
79.60.-i (Photoemission and photoelectron spectra) 71.18.+y (Fermi surface: calculations and measurements; effective mass, g factor)