Chin. Phys. Lett.  1999, Vol. 16 Issue (6): 446-448    DOI:
Original Articles |
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
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CHENG Li-li, DU Xu, QIN Xiao-chuan et al  1999 Chin. Phys. Lett. 16 446-448
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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.
Keywords: 74.25.-q      74.80.-g      74.80. Dm     
Published: 01 June 1999
PACS:  74.25.-q (Properties of superconductors)  
  74.80.-g  
  74.80. Dm  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1999/V16/I6/0446
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ZHANG Han
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