Landau-Gutzwiller quasi-particles

Bünemann, Jörg; Gebhard, Florian; Thul, Ruediger

Abstract

We define Landau quasiparticles within the Gutzwiller variational theory and derive their dispersion relation for general multiband Hubbard models in the limit of large spatial dimensions D. Thereby we reproduce our previous calculations which were based on a phenomenological effective single-particle Hamiltonian. For the one-band Hubbard model we calculate the frst-order corrections in 1/D and find that the corrections to the quasiparticle dispersions are small in three dimensions. They may be largely absorbed in a rescaling of the total bandwidth, unless the system is close to half band filling. Therefore, the Gutzwiller theory in the limit of large dimensions provides quasiparticle bands which are suitable for a comparison with real, three-dimensional Fermi liquids.

• Journal Article Type: Article
• Publication Date: Feb 10, 2003
• Journal: Physical Review B
• Print ISSN: 2469-9950
• Electronic ISSN: 1098-0121
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 67
• Article Number: 075103
• Institution Citation: Bünemann, J., Gebhard, F., & Thul, R. (2003). Landau-Gutzwiller quasi-particles. Physical Review B, 67, doi:10.1103/PhysRevB.67.075103
• DOI: https://doi.org/10.1103/PhysRevB.67.075103
• Publisher URL: http://journals.aps.org/prb/abstract/10.1103/PhysRevB.67.075103
• Copyright Statement: Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf