Band structures of al‐doped superconductors YBa 2 Cu 3– x  AL  x  O 7 + δ | Zendy

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Band structures of al‐doped superconductors YBa 2 Cu 3– x AL x O 7 + δ

Author(s) -

Ming Li

Publication year - 1994

Publication title -

international journal of quantum chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.484

H-Index - 105

eISSN - 1097-461X

pISSN - 0020-7608

DOI - 10.1002/qua.560500402

Subject(s) - superconductivity , electronic band structure , condensed matter physics , doping , electronic structure , band gap , high temperature superconductivity , materials science , crystallography , physics , chemistry

Based on the EHMO approach, an approximate treatment of electronic energy‐band structures is suggested. By employing this treatment, computations of the band structures for the Al‐doped superconductors YBa 2 Cu 3– x Al x O 7 + δ were carried out. It is shown by analysis of the band structures and the density of states that the 2D Cu–O planes in the YBa–CuO superconducting system play a dominant role in superconductivity, whereas the 1D CuO ribbons have indirectly an influence on superconductivity through the connection of the O(4) atoms to two CuO planes. © 1994 John Wiley & Sons, Inc.

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