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′ 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 (artificially) introduce a doping-dependent on-site interaction U.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′ 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 (artificially) introduce a doping-dependent on-site interaction U.

arXiv:cond-mat/0504618Low Temperature PhysicsApr 1, 20065 citations

Correlated band structure of electron-doped cuprate materials

Christopher Dahnken, Michael Potthoff, Enrico Arrigoni +1 more

We present a numerical study of the doping dependence of the spectral function of the n-type \ncuprates. Using a variational cluster-perturbation theory approach based upon the self-energyfunctional \ntheory, the spectral function of the electron-doped two-dimensional Hubbard model is \ncalculated. The model includes the next-nearest neighbor electronic hopping amplitude t' and a \nfixed on-site interaction U - 8t at half-filling and doping levels ranging from x - 0.077 to x - 0.20 . \nOur results support the fact that a comprehensive description of the single-particle spectrum of \nelectron-doped cuprates requires a proper treatment of strong electronic correlations. In contrast \nto previous weak-coupling approaches, we obtain a consistent description of the ARPES \nexperiments without the need to (artificially) introduce a doping-dependent on-site interaction U.We present a numerical study of the doping dependence of the spectral function of the n-type \ncuprates. Using a variational cluster-perturbation theory approach based upon the self-energyfunctional \ntheory, the spectral function of the electron-doped two-dimensional Hubbard model is \ncalculated. The model includes the next-nearest neighbor electronic hopping amplitude t' and a \nfixed on-site interaction U - 8t at half-filling and doping levels ranging from x - 0.077 to x - 0.20 . \nOur results support the fact that a comprehensive description of the single-particle spectrum of \nelectron-doped cuprates requires a proper treatment of strong electronic correlations. In contrast \nto previous weak-coupling approaches, we obtain a consistent description of the ARPES \nexperiments without the need to (artificially) introduce a doping-dependent on-site interaction U.

Jan 1, 20062 citations

Excitation content of spectral functions in the 1D t–J model

C. Lavalle, Mitsuhiro Arikawa, Alejandro Muramatsu

Physica C SuperconductivityApr 5, 20070 citations

Electron Spectral Function for the t-J Model.

T. McMullen, Zane P. Gibbs, Marilyn F. Bishop

APSMar 1, 19960 citations

Correlation functions and dynamical properties of the one-dimensional Hubbard model

Jian Xu, Jian‐Ping Yu

The oscillating behaviors of correlation functions in real space are determined for the one-dimensional Hubbard model with various electron densities and arbitrary values of U by the exact-diagonalization technique. Of them, the oscillation of density-density correlation function depends drastically on the value of U and doping: The oscillation occurs at 2 ${\mathit{k}}_{\mathit{F}}$ for small U or large doping and at 4 ${\mathit{k}}_{\mathit{F}}$ for large U or small doping. The pairing susceptibility in the singlet channel shows 2 ${\mathit{k}}_{\mathit{F}}$ oscillations while there are no oscillations in the triplet channel. The hole spectral function is also calculated, and it is found that in the large-U limit the dynamical property of a single hole depends strongly on the background with doping.The oscillating behaviors of correlation functions in real space are determined for the one-dimensional Hubbard model with various electron densities and arbitrary values of U by the exact-diagonalization technique. Of them, the oscillation of density-density correlation function depends drastically on the value of U and doping: The oscillation occurs at 2${\mathit{k}}_{\mathit{F}}$ for small U or large doping and at 4${\mathit{k}}_{\mathit{F}}$ for large U or small doping. The pairing susceptibility in the singlet channel shows 2${\mathit{k}}_{\mathit{F}}$ oscillations while there are no oscillations in the triplet channel. The hole spectral function is also calculated, and it is found that in the large-U limit the dynamical property of a single hole depends strongly on the background with doping.

Physical review. B, Condensed matterMar 15, 19925 citations

{\mathit{k}}_{\mathit{F}}

for small U or large doping and at 4

{\mathit{k}}_{\mathit{F}}

for large U or small doping. The pairing susceptibility in the singlet channel shows 2

{\mathit{k}}_{\mathit{F}}

oscillations while there are no oscillations in the triplet channel. The hole spectral function is also calculated, and it is found that in the large-U limit the dynamical property of a single hole depends strongly on the background with doping.