An extended Falicov-Kimball model on a triangular lattice
نویسندگان
چکیده
منابع مشابه
Falicov - Kimball Model
The “Falicov-Kimball model” was first considered by Hubbard and Gutzwiller in 1963– 65 as a simplification of the Hubbard model. Falicov and Kimball introduced in 1969 a model that included a few extra complications, in order to investigate metal-insulator phase transitions in rare-earth materials and transition-metal compounds. Experimental data suggested that this transition is due to the int...
متن کاملOrder, criticality, and excitations in the extended Falicov-Kimball model.
Using exact numerical techniques, we investigate the nature of excitonic (electron-hole) bound states and the development of exciton coherence in the one-dimensional half-filled extended Falicov-Kimball model. The ground-state phase diagram of the model exhibits, besides band-insulator and staggered orbital ordered phases, an excitonic insulator (EI) with power-law correlations. The criticality...
متن کاملSegregation in the Falicov-kimball Model
The Falicov-Kimball model is a simple quantum lattice model that describes light and heavy electrons interacting with an on-site repulsion; alternatively, it is a model of itinerant electrons and fixed nuclei. It can be seen as a simplification of the Hubbard model; by neglecting the kinetic (hopping) energy of the spin up particles, one gets the Falicov-Kimball model. We show that away from ha...
متن کاملBosonization solution of the Falicov-Kimball model.
We use a novel approach to analyze the one-dimensional spinless Falicov-Kimball model. We derive a simple effective model for the occupation of the localized orbitals which clearly reveals the origin of the known ordering. Our study is extended to a quantum model with hybridization between the localized and itinerant states: We find a crossover between the well-known weak- and strong-coupling b...
متن کاملThe Falicov-kimball Model, Effective Interaction
The effective interaction between the static particles in the Falicov-Kimball model is studied, for large values of the coupling constant, using a convergent cluster expansion. This text, presented at conference on “Advanced Topics in Applied Mathematics and Theoretical Physics”, Marseille, June 1994, was written for the proceedings that eventually were not published. However, see Refs. 11–14.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EPL (Europhysics Letters)
سال: 2011
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/93/47013