https://doi.org/10.1140/epjb/e2002-00406-4
Cuprate superconductivity interband model with a doping-formed spectrum
Institute of Physics, University of Tartu,
Riia 142, 51014 Tartu, Estonia
Corresponding author: a kolja@fi.tartu.ee
Received:
1
April
2002
Revised:
1
October
2002
Published online:
31
December
2002
The basic properties of cuprate superconductivity are analysed by using a descriptive interband model with the two-component electron spectrum determined by doping. Pair-transfer and vibronic interactions couple the itinerant and “defect” bands. The vibronic renormalization of gaps causes important effects. Two normal-state pseudogaps appear at underdoping as recently observed [17,18]. The pseudogap behaviour is extended beyond the underdoped region with the beginning of overlap of the band components. Various cuprate properties are analysed in a qualitative agreement with experiments.
PACS: 74.72.-h – High-Tc compounds / 74.20.Mn – Nonconventional mechanism Cuprate interband model
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002