Recent experimental data for the overdoped La2-xSrxCuO4 have firmly established the properties which characterize the transition between the superconducting and the Fermi liquid metallic phases (x̃ ≃ 0.25). The thermodynamic response functions show a pronounced feature at this point, while the Fermi surface undergoes a dramatic change. By use of the Composite Operator Method for the two-dimensional Hubbard model, it is found that the presence of a van Hove singularity in the lower Hubbard band can explain these behaviors. © 1998 Elsevier Science Ltd. All rights reserved.

The overdoped regime in La2-xSrxCuO4

AVELLA, Adolfo;MANCINI, Ferdinando;
1998

Abstract

Recent experimental data for the overdoped La2-xSrxCuO4 have firmly established the properties which characterize the transition between the superconducting and the Fermi liquid metallic phases (x̃ ≃ 0.25). The thermodynamic response functions show a pronounced feature at this point, while the Fermi surface undergoes a dramatic change. By use of the Composite Operator Method for the two-dimensional Hubbard model, it is found that the presence of a van Hove singularity in the lower Hubbard band can explain these behaviors. © 1998 Elsevier Science Ltd. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/1064901
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