中国物理B ›› 1995, Vol. 4 ›› Issue (10): 766-773.doi: 10.1088/1004-423X/4/10/005

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TEMPERATURE-DEPENDENT ANISOTROPY IN La1.86Sr0.14CuO4

袁松柳   

  1. High Magnetic Field Laboratory, Institute of Plasma Physics, Academia Sinica, Hefei 230031 , China
  • 收稿日期:1994-11-03 出版日期:1995-10-20 发布日期:1995-10-20
  • 基金资助:
    Project supported in part by the National Center of R & D on Superconductivity of China and by the Bureau of Education, Academia Sinica, for Excellent Returned Scientists.

TEMPERATURE-DEPENDENT ANISOTROPY IN La1.86Sr0.14CuO4

YUAN SONG-LIU (袁松柳)   

  1. High Magnetic Field Laboratory, Institute of Plasma Physics, Academia Sinica, Hefei 230031 , China
  • Received:1994-11-03 Online:1995-10-20 Published:1995-10-20
  • Supported by:
    Project supported in part by the National Center of R & D on Superconductivity of China and by the Bureau of Education, Academia Sinica, for Excellent Returned Scientists.

摘要: Based on the scaling rule: R(T, H, θ) = R(T, h), where h = H(sin2θ+cos2θ/γ2)1/2 and θ is field angle with respect to the ab-plane, the scaling approach is performed to examine the c-axis resistances of single crystalline La1.86Sr0.14CuO4 as functions of field and its orientation at different temperatures. The anisotropy parameter γ of the system is extracted from the scaling approach, but shows an unusual temperature-dependent behavior, which is not expected by conventional theory. A phenomenological explanation of this temperature dependence is presented.

Abstract: Based on the scaling rule: R(T, H, $\theta$) = R(T, h), where h = H(sin2$\theta$+cos2$\theta$/$\gamma$2)1/2 and $\theta$ is field angle with respect to the ab-plane, the scaling approach is performed to examine the c-axis resistances of single crystalline La1.86Sr0.14CuO4 as functions of field and its orientation at different temperatures. The anisotropy parameter $\gamma$ of the system is extracted from the scaling approach, but shows an unusual temperature-dependent behavior, which is not expected by conventional theory. A phenomenological explanation of this temperature dependence is presented.

中图分类号: 

  • 74.25.Fy
74.25.Op (Mixed states, critical fields, and surface sheaths) 74.62.-c (Transition temperature variations, phase diagrams)