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Evidence for a metallic–like state in the T=0 K phase diagram of a high temperature superconductor

  • A. A. Schmidt
  • J. J. Rodríguez-Núñez
  • I. Ţifrea
Solid and Condensed State Physics

Abstract.

We examine the effects of a phenomenological pseudogap on the T=0 K phase diagram of a high temperature superconductor within a self-consistent model which exhibits a d-wave pairing symmetry. At the mean-field level the presence of a pseudogap in the normal phase of the high temperature superconductor is proved to be essential for the existence of a metallic–like state in the density versus interaction phase diagram. In the small density limit, at high attractive interaction, bosonic–like degrees of freedom are likely to emerge. Our result should be relevant for underdoped high temperature superconductors, where there is a strong evidence for the presence of a pseudogap in the excitation spectrum of the normal state quasiparticles.

Keywords

Neural Network Phase Diagram Normal State Complex System Strong Evidence 
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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • A. A. Schmidt
    • 1
  • J. J. Rodríguez-Núñez
    • 2
  • I. Ţifrea
    • 3
  1. 1.Departamento de Matemática, CCNEUniversidade Federal de Santa MariaSanta MariaBrazil
  2. 2.Departamento de Fisica-FACYTUniversidad de CaraboboValenciaVenezuela
  3. 3.Department of Theoretical PhysicsUniversity of ClujClujRomania

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