Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (11): 1053-1056.doi: 10.3866/PKU.WHXB19951119

• Note • Previous Articles    

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
  • Contact: Zhao Liang-Zhong

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