One-electron self energies and spectral functions for the t-J model in the large-N limit

Abstract

Using a recently developed perturbative approach, which considers Hubbard operators as fundamental excitations, we have performed electronic self-energy and spectral function calculations for the $t-J$ model on the square lattice. We have found that the spectral functions along the Fermi surface are isotropic, even close to the critical doping where the $d$-density wave phase takes place. Fermi liquid behavior with scattering rate $\sim {\omega }^2$ and a finite quasiparticle weight $Z$ was obtained. $Z$ decreases with decreasing doping taking low values for low doping. Results are compared with other ones, analytical and numerical like slave-boson and Lanczos diagonalization finding agreement. We discuss our results in the light of recent $ARPES$ experiments in cuprates.

10 pages, 9 figures, accepted for publication in Phys. Rev. B

Cited by in corpus (8)

• Fingerprints of spin-orbital entanglement in transition metal oxides
• Spectral properties of orbital polarons in Mott insulators
• Electron self-energy from quantum charge fluctuations in the layered t-J model with long-range Coulomb interaction
• Theoretical insights into electronic nematic order, bond-charge orders, and plasmons in cuprate superconductors
• Self-energy renormalization around the flux phase in the $t-J$ model: Possible implications in underdoped cuprates
• Role of dynamical non-double-occupancy excitations on the quasiparticle damping of the $t-J$ model in the large-$N$ limit
• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors
• Theoretical perspectives on charge dynamics in high-temperature cuprate superconductors