Influence of partial substitution of zinc for copper on electronic structures of YBa2Cu3O
y |
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| Authors: | Li Ming Wu Xiaoping |
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| Institution: | (1) Department of Chemistry, Southwest China Normal University, 630715 Chongqing, People's Republic of China;(2) Department of Exploration of Mineral Resources, Chengdu Institute of Technology, 610059 Chengdu, People's Republic of China |
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| Abstract: | Summary By use of an approximate band-structure treatment based on the EHMO approach, the energy band structures for the Zn-doped superconductor YBa2Cu3–x
Zn
x
O
y
were calculated in the present paper and the influence of partial substitution of zinc for copper on the electronic structures for orthorhombic YBa2Cu3Oy was studied. From analysis of the band structures and the densities of states for YBa2Cu3–x
Zn
x
O
y
, it was demonstrated that the 2D Cu-O planes in the Y-Ba-Cu-O superconducting system have a direct and dominant influence on superconductivity, whereas the role of the 1D Cu-O ribbons and the O(4) atoms is also of some importance. |
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| Keywords: | Superconductor Zn-doping Band structure YBa2Cu3– x
Zn
x
O
y
EHMO approach |
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