摘要
The Cu2p XPS satellites of high-Tc superconductors axe 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.
The Cu2p XPS satellites of high-Tc superconductors axe 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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1995年第11期1053-1056,共4页
Acta Physico-Chimica Sinica
关键词
超导体
原子电荷
铜
氧
XPS
High-T_c superconductors
Chemical bonds
Atomic charge
