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Doping Dependence of Tc

  • Shigeji Fujita
  • Kei Ito
  • Salvador Godoy
Chapter

The dome-shaped doping dependence of the superconducting temperature \(T_{c}\) in La\(_{2-x}\)Sr\(_{x}\)CuO4 (Nd\(_{2-x}\)Ce\(_{x}\)CuO\(_{4-\delta}\)) is described in this chapter, based on the model in which the O-(Cu-)Fermi surface changes by the doping. At the end of the overdoping, where the critical temperature \(T_{c}\) vanishes, inversion of the Fermi surface curvature occurs, a phenomenon which can be observed as the sign change of the Hall coefficient. For the optimum Fermi surface (highest \(T_{c}\)) the Cooper pair has a d-wave probability density distribution. This anisotropy decreases with increasing doping.

Keywords

Critical Temperature Fermi Surface Optical Phonon Cooper Pair Hall Coefficient 
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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of PhysicsState University of New YorkBuffaloUSA
  2. 2.National Center for UniversityTokyoJapan
  3. 3.Department of FísicaUniversidad Nacional Autónoma de MéxicoMéxicoMéxico

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