中国物理B ›› 1994, Vol. 3 ›› Issue (3): 190-199.doi: 10.1088/1004-423X/3/3/005

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

EFFECT OF THE SUBSTITUTION OF Ga AND Sn FOR Cu ON THE ELECTRONIC STRUCTURE AND SUPERCONDUCTIVITY OF La1.85Sr0.15CuO4

冯小兵1, 郝学军1, 章立源1, 王怀玉2   

  1. (1)Department of Physics, Peking University, Beijing 100871, China; (2)Department of Physics, Yantai University, Yantai 264005, China
  • 收稿日期:1993-03-15 出版日期:1994-03-20 发布日期:1994-03-20
  • 基金资助:
    Project supported by the Doctoral Program Foundation of Institution of Higher Education of China.

EFFECT OF THE SUBSTITUTION OF Ga AND Sn FOR Cu ON THE ELECTRONIC STRUCTURE AND SUPERCONDUCTIVITY OF La1.85Sr0.15CuO4

FENG XIAO-BING (冯小兵)a, HAO XUE-JUN (郝学军)a, ZHANG LI-YUAN (章立源)a, WANG HUAI-YU (王怀玉)b   

  1. a Department of Physics, Peking University, Beijing 100871, China; b Department of Physics, Yantai University, Yantai 264005, China
  • Received:1993-03-15 Online:1994-03-20 Published:1994-03-20
  • Supported by:
    Project supported by the Doctoral Program Foundation of Institution of Higher Education of China.

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摘要： The electronic structure of La1.85Sr0.15CuO4， as well as the two cases of substitution of Ga and Sn for Cu, has been studied by the recursion method. The change of hole concentration and the effective local magnetic moment have also been calculated. Our calculations show that Ga and Sn destroy the two-dimensional character of the CuO2 plane and lead to the disorder of the electronic structure, accompanied by the migration of electrons which canines the decrease of the hole concentration in the CuO2 planes. From our point of view, these changes may be responsible for the destruction of superconductivity of the Ga and Sn-doped systems.

Abstract: The electronic structure of La1.85Sr0.15CuO4， as well as the two cases of substitution of Ga and Sn for Cu, has been studied by the recursion method. The change of hole concentration and the effective local magnetic moment have also been calculated. Our calculations show that Ga and Sn destroy the two-dimensional character of the CuO2 plane and lead to the disorder of the electronic structure, accompanied by the migration of electrons which canines the decrease of the hole concentration in the CuO2 planes. From our point of view, these changes may be responsible for the destruction of superconductivity of the Ga and Sn-doped systems.

中图分类号:  (Electronic structure (photoemission, etc.))

  • 74.25.Jb
74.25.Ha (Magnetic properties including vortex structures and related phenomena) 75.30.Cr (Saturation moments and magnetic susceptibilities)