Quasi-Particle Density of States of Two-Dimensional Hubbard Model
スポンサーリンク
概要
- 論文の詳細を見る
The density of states (DOS) of the two-dimensional Hubbardmodel is calculated in second-order perturbation with respect to theon-site Coulomb interaction U. The direct analytic continuationformula is presented to calculate the self-energy on thereal-frequency axis. The momentum as well as the energy integral inthe self-energy is seriously carried out with use of theFast-Fourier-Transformation algorithm. Near the half-filling, theimaginary part of the self-energy becomes proportional to the energyin the vicinity of the Fermi level in our weak-couplingcalculation. In the interacting case, the van Hove singularity (VHS)in DOS is smeared by the self-energy effect, but there still exists asharp peak structure due to VHS.
- 1995-08-15
論文 | ランダム
- Pharmacokinetics and Antitumor Effects of an Interleukin-2 Immunocomplexing Agent in Murine Renal Cell Carcinoma
- Design and Preparation of Molecularly Imprinted Atrazine-Receptor Polymers : Investigation of Functional Monomers and Solvents
- Design and Preparation of Molecularly Imprinted Atrazine-Receptor Polymers:Investigation of Functional Monomers and Solvents
- Development of modified cyclic peptides for imaging of CXCR4 receptors
- 台湾におけるデジタルコンテンツの流動化と知的財産制度の課題--法的環境の整備と問題点を中心に (共同企画・アジア特集)