Calculation of combinative energy between perovskite and rocksalt blocks inYBa2Cu3O | Zendy

Hongtao Zhang | Zendy; Lili Cheng | Zendy; Yijiao Zhao | Zendy

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Calculation of combinative energy between perovskite and rocksalt blocks inYBa2Cu3O

Author(s) -

Hongtao Zhang,

Lili Cheng,

Yijiao Zhao

Publication year - 2000

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.62.13907

Subject(s) - orthorhombic crystal system , energy (signal processing) , phase diagram , superconductivity , perovskite (structure) , physics , crystallography , charge (physics) , condensed matter physics , phase (matter) , combinatorics , particle physics , diffraction , quantum mechanics , chemistry , mathematics

Based on a block model, separating the unit cell of YBa2Cu3O7-[delta] into perovskite and rock salt blocks, the combinative energy between the two blocks in the YBa2Cu3O7-[delta] with the different [delta] value, from 0.07 to 0.62, was calculated. A close relationship between the superconducting transition temperature and the combinative energy in YBa2Cu3O7-[delta] is established, and the change of the combinative energy is closely related to the transformation from orthorhombic I to II. The results also give a clue to reconsider the role of the orthorhombic I and II in YBa2Cu3O7-[delta]. The calculation of the holes in different planes supplies abundant information about the charge distribution in YBa2Cu3O7-[delta], which may possibly connect the electronic phase diagram and the fluctuations of the stripe phase. The results show that the interaction between the two blocks is of great importance for high Tc superconductivity

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