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A model for the doped copper oxide compounds

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Alonso, J.L. and Boucaud, Ph. and Martín Mayor, Víctor and van der Sijs, A.J. (1998) A model for the doped copper oxide compounds. Europhysics letters, 42 (5). pp. 541-546. ISSN 0295-5075

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Official URL: http://dx.doi.org/10.1209/epl/i1998-00285-3


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Abstract

We present a relativistic spin-fermion model for the cuprates, in which both the charge and spin degrees of freedom are treated dynamically. The spin-charge coupling parameter is associated with the doping fraction. The model is able to account for the various phases of the cuprates and their properties, not only at low and intermediate doping but also for (highly) over-doped compounds. In particular, we acquire a qualitative understanding of high-Tc superconductivity through Bose-Einstein condensation of bound charge pairs. The mechanism that binds these pairs does not require a Fermi sea.


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© EDP Sciences. We are indebted to A. Muramatsu for very helpful remarks and stimulating discussions. We also acknowledge interesting discussions with A. Cruz, Ph. de Forcrand, J. M. De Teresa, J. G. Esteve, D. Frenkel, J. García, M. R. Ibarra, R. Mahendiran, R. Navarro, C. Rillo and especially G. Sierra. We thank L. A. Fernández, A. Tarancón and the others members of the RTNN collaboration for computing facilities. This work is financially supported by DGICYT (Spain), project AEN 96-1670, and by Acción Integrada Hispano-Francesa HF1996-0022.

Uncontrolled Keywords:Quantum Heisenberg-antiferromagnet; High-temperature superconductors; Scalar-fermion model; Spin correlations; Bag mechanism; Phase-diagram; Symmetry; State.
Subjects:Sciences > Physics > Physics-Mathematical models
ID Code:47064
Deposited On:19 Apr 2018 08:34
Last Modified:19 Apr 2018 08:34

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