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- Title
Mott transition in the dynamic Hubbard model within slave boson mean-field approach.
- Authors
Le, Duc-Anh
- Abstract
At zero temperature, the Kotliar-Ruckenstein slave boson mean-field approach is applied to the dynamic Hubbard model. In this paper, the influences of the dynamics of the auxiliary boson field on the Mott transition are investigated. At finite boson frequency, the Mott-type features of the Hubbard model is found to be enhanced by increasing the pseudospin coupling parameter g. For sufficiently large pseudospin coupling g, the Mott transition occurs even for modest values of the bare Hubbard interaction U. The lack of electron-hole symmetry is highlighted through the quasiparticle weight. Our results are in good agreement with the ones obtained by two-site dynamical mean-field theory and determinant quantum Monte Carlo simulation.
- Subjects
METAL-insulator transitions; DYNAMIC models; HUBBARD model; BOSONS; MEAN field theory; TEMPERATURE effect
- Publication
Modern Physics Letters B, 2014, Vol 28, Issue 10, p-1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S021798491450078X