中国物理B ›› 1999, Vol. 8 ›› Issue (3): 193-198.doi: 10.1088/1004-423X/8/3/006

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A POSSIBLE SOLITON-LIKE POLARON MODEL FOR SUPERCONDUCTORS Y1-xCaxBa2Cu3-xMxO7-δ(M=Fe, Ni)

汪克林1, 黄效吾2, 王忆3, 陈传誉3   

  1. (1)Center for Fundamental Physics, University of Science and Technology of China, Hefei 230026, China; (2)Department of Physics, Anhui University, Hefei 230039, China; (3)Department of Physics, Guangzhou Teachers College, Guangzhou 510400, China
  • 收稿日期:1998-07-15 修回日期:1998-10-22 出版日期:1999-03-15 发布日期:1999-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 19804009), and the Natural Science Foundation of Guangdong Province (Grant No. 974199), China.

A POSSIBLE SOLITON-LIKE POLARON MODEL FOR SUPERCONDUCTORS Y1-xCaxBa2Cu3-xMxO7-$\delta$(M=Fe, Ni)

Wang Yi (王忆)a, Chen Chuan-yu (陈传誉)a, Huang Xiao-wu (黄效吾)b, Wang Ke-lin (汪克林)c   

  1. a Department of Physics, Guangzhou Teachers College, Guangzhou 510400, China;
    b Department of Physics, Anhui University, Hefei 230039, China; 
    c Center for Fundamental Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:1998-07-15 Revised:1998-10-22 Online:1999-03-15 Published:1999-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 19804009), and the Natural Science Foundation of Guangdong Province (Grant No. 974199), China.

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摘要： Using 1+1 soliton-like polaron model of a deformable continuum, the critical temperature and the energy gap in high-temperature superconductors Y1-xCaxBa2Cu3-xMxO7-δ(M=Fe,Ni) are studied in the framework of finite temperature Green's function theory. The ratio 2Δ/kBTc=3.9 is obtained. Theoretical results are found in good agreement with the experimental data.

Abstract: Using 1+1 soliton-like polaron model of a deformable continuum, the critical temperature and the energy gap in high-temperature superconductors Y1-xCaxBa2Cu3-xMxO7-$\delta$(M=Fe, Ni) are studied in the framework of finite temperature Green's function theory. The ratio 2$\varDelta$/kBTc=3.9 is obtained. Theoretical results are found in good agreement with the experimental data.

中图分类号:  (Nonconventional mechanisms)

  • 74.20.Mn