Landau-Gutzwiller quasi-particles
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-particl...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Published: |
American Physical Society
2003
|
| Online Access: | https://eprints.nottingham.ac.uk/999/ |
| _version_ | 1848790523592048640 |
|---|---|
| author | Bünemann, Jörg Gebhard, Florian Thul, Ruediger |
| author_facet | Bünemann, Jörg Gebhard, Florian Thul, Ruediger |
| author_sort | Bünemann, Jörg |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T18:13:58Z |
| format | Article |
| id | nottingham-999 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T18:13:58Z |
| publishDate | 2003 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-9992020-05-04T16:25:44Z https://eprints.nottingham.ac.uk/999/ Landau-Gutzwiller quasi-particles Bünemann, Jörg Gebhard, Florian Thul, Ruediger 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. American Physical Society 2003-02-10 Article PeerReviewed Bünemann, Jörg, Gebhard, Florian and Thul, Ruediger (2003) Landau-Gutzwiller quasi-particles. Physical Review B, 67 . 075103/1-0751103/11. ISSN 1098-0121 http://journals.aps.org/prb/abstract/10.1103/PhysRevB.67.075103 doi:10.1103/PhysRevB.67.075103 doi:10.1103/PhysRevB.67.075103 |
| spellingShingle | Bünemann, Jörg Gebhard, Florian Thul, Ruediger Landau-Gutzwiller quasi-particles |
| title | Landau-Gutzwiller quasi-particles |
| title_full | Landau-Gutzwiller quasi-particles |
| title_fullStr | Landau-Gutzwiller quasi-particles |
| title_full_unstemmed | Landau-Gutzwiller quasi-particles |
| title_short | Landau-Gutzwiller quasi-particles |
| title_sort | landau-gutzwiller quasi-particles |
| url | https://eprints.nottingham.ac.uk/999/ https://eprints.nottingham.ac.uk/999/ https://eprints.nottingham.ac.uk/999/ |