A Fermi liquid model for the overdoped and optimally doped cuprate superconductors: scattering rate, susceptibility, spin resonance peak and superconducting transition

Abstract

This paper treats a number of issues of the cuprates, ranging from the spin resonance peak and the linear one-particle scattering rate to the superconducting transition, in the frame of a Fermi liquid model. Recent ARPES expts. by Valla et al., Science vol. 285, 2110 (1999), and e-print cond-mat/0003407, directly support the linearity of the one-particle scattering rate everywhere in the Brillouin zone we obtained here. We show that the origin of this linearity is the strong linear in energy term of the imaginary part of the carrier susceptibility. This result yields directly a linear in temperature resistivity and linear in 1/energy optical conductivity. We show that the low energy dependence of the susceptibility can have a purely fermionic origin. We introduce an antiferromagnetic ansatz for the susceptibility of the carriers.Inter alia, this ansatz may explain the appearance of the spin resonance peak (observed in neutron scattering) in the normal state of the cuprates. Further, we obtain particularly high transition temperatures $T_c$ from our Eliashberg scheme by using this ansatz: we have a $d_{x^2-y^2}$ gap with $T_c>120^o$K for nearest neighbour hopping $t=250meV$.

This version corrects a few misprints of the printed version

References in corpus (3)

• The pseudogap in high-temperature superconductors: an experimental survey
• Neutron Scattering from Magnetic Excitations in Bi_2 Sr_2 Ca_2 O_8+delta
• Hall Effect and Resistivity in High-Tc Superconductors: The Conserving Approximation

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