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Landau-Gutzwiller quasi-particles

Bünemann, Jörg; Gebhard, Florian; Thul, Ruediger

Authors

Jörg Bünemann

Florian Gebhard

Ruediger Thul ruediger.thul@nottingham.ac.uk



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

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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