Relationship Eetween Superconducting Transition Temperature and Combinative Energy in YBa_(2)Cu_(3)O_(7-δ)  

作　　者：CHENG Li-li DU Xu QIN Xiao-chuan ZHANG Han 成丽丽;杜序;秦小川;张酣(Materials Physics Laboratory,State Key Laboratory for Artificial Microstructure and Mesoscope Physics,Department of Physics,Peking University,Beijing 100871)

机构地区：[1]Materials Physics Laboratory,State Key Laboratory for Artificial Microstructure and Mesoscope Physics,Department of Physics,Peking University,Beijing 100871

出　　处：《Chinese Physics Letters》1999年第6期446-448,共3页中国物理快报（英文版）

基　　金：Supported by the Trans-Century Training Programs Foundation for the Talents by the Ministry of Education of China.

摘　　要：Separating the unit cell of YBa_(2)Cu_(3)O_(7-δ) into perovskite and rock salt blocks and considering the interaction between the two blocks,a computer program has been developed to calculate the interaction called combinative energy,between the blocks.The combinative energy in YBa_(2)Cu_(3)O_(7-δ) with different 6 value from 0.07 to 0.62 has been calculated.A close relationship bet ween the superconducting transition temperature and the combinative energy in YBa_(2)Cu_(3)O_(7-δ) has been established,and the change of the combinative energy found to be closely related to the transformation from orthorhombic I to K.It is believed that the interaction between the two blocks in the unit cell is of great importance to the superconductivity in YBa_(2)Cu_(3)O_(7-δ) .

关 键 词：TRANSITION BLOCKS 

分 类 号：G63[文化科学—教育学]