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Investigation of Hole Distribution in Y1-xPrxBa2Cu3O7 |
YU Ya-bin1,2;CAO Guang-han1;JIAO Zheng-kuan1 |
1Department of Physics, Zhejiang University, Hangzhou 310027
2Department of Physics, Yantai University, Yantai 264005
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Cite this article: |
YU Ya-bin, CAO Guang-han, JIAO Zheng-kuan 1998 Chin. Phys. Lett. 15 525-527 |
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Abstract The electronic structure of Y1-xPrxBa2Cu3O7 is described by a tight-binding Hamiltonian in which the Pr-O hybridization and the 2pσ - 2pπ Coulomb repulsion are taken into account. The dependence of planar hole-density, localized hole-density and chemical potential of holes on Pr concentration is calculated by a coherent potential approximation. The result shows that the insensitivity of hole-density on the CuO3 chains with the Pr-doping is due to the 2pσ - 2pπ repulsion. Some other experimental facts can also be well interpreted.
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Keywords:
74.20.Mn
74.25.Jb
74.72.Bk
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Published: 01 July 1998
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