物理化学学报 >> 1995, Vol. 11 >> Issue (11): 1053-1056.doi: 10.3866/PKU.WHXB19951119

研究简报 上一篇    

高温超导体的Cu-O键型和氧上的部分电荷

赵良仲   

  1. 中国科学院化学研究所，北京 100080
  • 收稿日期:1995-02-25 修回日期:1995-04-24 发布日期:1995-11-15
  • 通讯作者:

The Cu-O Bond Type and Partial Charge on Oxygen in High-Tc Superconductors

Zhao Liang-Zhong   

  1. Institute of Chemistry,Academia Sinica,Beijing 100080
  • Received:1995-02-25 Revised:1995-04-24 Published:1995-11-15
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关键词: 高温超导体, 化学键, 原子电荷

Abstract:

The Cu2p XPS satellites of high-Tc superconductors are compared with one of the Cu2+-containing compounds with different bonding type. The results show that Cu-O bonds in high-Tc superconductors are a blend of covalent and ionic. The contribution of covalent bonding to Cu-O bonds is greater for high-Tc superconductors than for CuO. The average partial charge on oxygen (-δO) are calculated for a number of high-Tc superconductors. A correlation between Tc and -δO has been found, i.e. the Tc increases with decreasing –δO.

Key words: High-Tc Superconductors, Chemical bonds, Atomic charge