Quasiparticle spectral weights of Gutzwiller-projected high T_c superconductors

Abstract

We analyze the electronic Green's functions in the superconducting ground state of the t-J model using Gutzwiller-projected wave functions, and compare them to the conventional BCS form. Some of the properties of the BCS state are preserved by the projection: the total spectral weight is continuous around the quasiparticle node and approximately constant along the Fermi surface. On the other hand, the overall spectral weight is reduced by the projection with a momentum-dependent renormalization, and the projection produces electron-hole asymmetry in renormalization of the electron and hole spectral weights. The latter asymmetry leads to the bending of the effective Fermi surface which we define as the locus of equal electron and hole spectral weight.

6 pages, 5 figures; x-labels on Figs. 1 and 2 corrected, footnote on particle number corrected, references added

References in corpus (3)

• Determining the underlying Fermi surface of strongly correlated superconductors
• Spectral Weights, d-wave Pairing Amplitudes, and Particle-hole Tunneling Asymmetry of a Strongly Correlated Superconductor
• Quantum antiferromagnetism and high $T_C$ superconductivity: a close connection between the t-J model and the projected BCS Hamiltonian

Cited by in corpus (5)

• Magnetism and superconductivity in the $t-t^{\prime }-J$ model
• Grand canonical Gutzwiller approximation for magnetic inhomogeneous systems
• Electronic structure of kinetic energy driven cuprate superconductors
• Two-mode variational Monte Carlo study of Quasiparticle excitations in cuprates
• SU(2) approach to the pseudogap phase of high-temperature superconductors: electronic spectral functions