Correlated band structure of electron-doped cuprate materials

Abstract

We present a numerical study of the doping dependence of the spectral function of the n-type cuprates. Using a variational cluster-perturbation theory approach based upon the self-energy-functional theory, the spectral function of the electron-doped two-dimensional Hubbard model is calculated. The model includes the next-nearest neighbor electronic hopping amplitude $t^{\prime }$ and a fixed on-site interaction $U=8t$ at half filling and doping levels ranging from $x=0.077$ to $x=0.20$. Our results support the fact that a comprehensive description of the single-particle spectrum of electron-doped cuprates requires a proper treatment of strong electronic correlations. In contrast to previous weak-coupling approaches, we obtain a consistent description of the ARPES experiments without the need to introduce a doping-dependent on-site interaction $U$.

7 pages 4 eps figures

References in corpus (5)

• Self-energy-functional approach to systems of correlated electrons
• Variational cluster approach to correlated electron systems in low dimensions
• Competition between Antiferromagnetism and Superconductivity in High $T_c$ Cuprates
• Hot Spots and Pseudogaps for Hole- and Electron-Doped High-Temperature Superconductors
• Variational cluster approach to spontaneous symmetry breaking: The itinerant antiferromagnet in two dimensions

Cited by in corpus (3)

• Spectral properties near the Mott transition in the two-dimensional Hubbard model with next-nearest-neighbor hopping
• Characteristics of the Mott transition and electronic states of high-temperature cuprate superconductors from the perspective of the Hubbard model
• Non-resonant Raman response of inhomogeneous structures in the electron doped $t-t^{\prime }$ Hubbard model