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VOLUME 77 (2003) | ISSUE 12 | PAGE 803
Quasiparticles in the superconducting state of high-Tc metals
PACS: 74.20.-z, 74.25.Fy, 74.72.-h
Abstract
We consider the behavior of quasiparticles in the superconducting state of high-Tc metals within the framework of the theory of superconducting state based on the fermion condensation quantum phase transition. We show that the behavior coincides with the behavior of Bogoliubov quasiparticles, whereas the maximum value of the superconducting gap and other exotic properties are determined by the presence of the fermion condensate. If at low temperatures the normal state is recovered by the application of a magnetic field suppressing the superconductivity, the induced state can be viewed as Landau Fermi liquid. These observations are in good agreement with recent experimental facts.