Relationship Between Superconducting Transition Temperature and Combinative Energy in YBa2Cu3O7-δ
CHENG Li-li, DU Xu, QIN Xiao-chuan, ZHANG Han
Materials Physics Laboratory, State Key Laboratory for Artificial Microstructure and Mesoscope Physics, Department of Physics, Peking University, Beijing 100871
Relationship Between Superconducting Transition Temperature and Combinative Energy in YBa2Cu3O7-δ
CHENG Li-li;DU Xu;QIN Xiao-chuan;ZHANG Han
Materials Physics Laboratory, State Key Laboratory for Artificial Microstructure and Mesoscope Physics, Department of Physics, Peking University, Beijing 100871
Abstract： Separating the unit cell of YBa2Cu3O7-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 YBa2Cu3O7-δ with different 6 value from 0.07 to 0.62 has been calculated. A close relationship between the superconducting transition temperature and the combinative energy in YBa2Cu3O7-δ has been established, and the change of the combinative energy found to be closely related to the transformation from orthorhombic I to II. It is believed that the interaction between the two blocks in the unit cell is of great importance to the superconductivity in YBa2Cu3O7-δ.
CHENG Li-li;DU Xu;QIN Xiao-chuan;ZHANG Han. Relationship Between Superconducting Transition Temperature and Combinative Energy in YBa2Cu3O7-δ[J]. 中国物理快报, 1999, 16(6): 446-448.
CHENG Li-li, DU Xu, QIN Xiao-chuan, ZHANG Han. Relationship Between Superconducting Transition Temperature and Combinative Energy in YBa2Cu3O7-δ. Chin. Phys. Lett., 1999, 16(6): 446-448.
1999, Vol. 16 
