中国物理B ›› 1999, Vol. 8 ›› Issue (12): 927-931.doi: 10.1088/1004-423X/8/12/008

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LECTRONIC STRUCTURE STUDIES OF Bi2Sr2CaCu2-xSnxO8+δ SYSTEM

潘海斌1, 祝传刚1, 徐彭寿1, 周映雪1, 张新夷1, 李旗2   

  1. (1)National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China; (2)Technical Physics Department, Peking University, Beijing 10087l, China;National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
  • 收稿日期:1999-01-22 修回日期:1999-05-17 出版日期:1999-12-15 发布日期:2005-06-29

LECTRONIC STRUCTURE STUDIES OF Bi2Sr2CaCu2-xSnxO8+$\delta$ SYSTEM

LI QI (李旗)ab, PAN HAI-BIN (潘海斌)b, ZHU CHUAN-GANG (祝传刚)b, XU PENG-SHOU (徐彭寿)b, ZHOU YING-XUE (周映雪)b, ZHANG XIN-YI (张新夷)b   

  1. a Technical Physics Department, Peking University, Beijing 10087l, China; b National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
  • Received:1999-01-22 Revised:1999-05-17 Online:1999-12-15 Published:2005-06-29

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摘要： Photoemission measurements have been carried out for Bi2Sr2CaCu2-xSnxO8+δ system with conventional x-ray photoemission spectroscopy for core-level spectra and synchrotron radiation photoemission spectroscopy for valence band. With Sn doping, all core levels shift differently in binding energy, and the intensity near fermi energy becomes smaller in valence hand. From the experiment, we can deduce that the shifts of all core levels and valence hands may involve some other mechanisms, such ms electrostatic effects, in addition to binding energy referencing effects. We argue that the chemical environment plays a crucial role in the electronic structure of high-temperature superconductors.

Abstract: Photoemission measurements have been carried out for Bi2Sr2CaCu2-xSnxO8+$\delta$ system with conventional x-ray photoemission spectroscopy for core-level spectra and synchrotron radiation photoemission spectroscopy for valence band. With Sn doping, all core levels shift differently in binding energy, and the intensity near fermi energy becomes smaller in valence hand. From the experiment, we can deduce that the shifts of all core levels and valence hands may involve some other mechanisms, such ms electrostatic effects, in addition to binding energy referencing effects. We argue that the chemical environment plays a crucial role in the electronic structure of high-temperature superconductors.

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

  • 74.25.Jb
79.60.Bm (Clean metal, semiconductor, and insulator surfaces) 74.62.Dh (Effects of crystal defects, doping and substitution)