1997/03/13 by George Kastrinakis, Kastrinakis, George
Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.cond-mat/9703141
openalex publication_date 1997/03/13 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
Based on an unconventional Fermi liquid model, we present several results on\nthe optimally doped and overdoped cuprate superconductors. For the normal\nstate, we provide an analytic demonstration, backed by self-consistent\nBaym-Kadanoff (BK) numerical calculations, of the linear in T resistivity and\nlinear in 1/\ε optical conductivity, provided the interacting Fermi\nliquid has strong peaks in its density of states (van-Hove singularities in 2\ndimensions) near the chemical potential \μ. Moreover, we find that the\ninteractions tend to pin these strong density of states peaks close to \μ.\nWe show that the low energy dependence of \χMMP has a fermionic origin.\nWe obtain particularly high transition temperatures Tc from our\nBK-Eliashberg scheme by introducing an ansatz for the fermionic susceptibility\nof the carriers. We postulate that the latter is enhanced in an additive manner\ndue to the weak antiferromagnetic order of the CuO2 planes. We have obtained\na dx2-y2 gap with Tc > 120 oK for n.n. hopping t=250meV.\n