Phase separation in the combined Falicov-Kimball and static Holstein model
نویسندگان
چکیده
منابع مشابه
Phase separation in the neutral Falicov-Kimball model
The Falicov-Kimball model consists of spinless electrons and classical particles (ions) on a lattice. The electrons hop between nearest neighbor sites while the ions do not. We consider the model with equal numbers of ions and electrons and with a large on-site attractive force between ions and electrons. For densities 1/4 and 1/5 the ion configuration in the ground state had been proved to be ...
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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 کاملPhase separation in the binary-alloy problem: The one-dimensional spinless Falicov-Kimball model.
The ground states of the one-dimensional Falicov-Kimball model are investigated in the small-coupling limit, using nearly degenerate perturbation theory. For rational electron and ion densities, respectively, equal to p/q , pi /q , with p relatively prime to q and pi /q close enough to 1 2, we find that in the ground state the ion configuration has a period q . The situation is analogous to the...
متن کاملProof of phase separation in the binary-alloy problem: the one-dimensional spinless Falicov-Kimball model
The ground states of the one-dimensional Falicov-Kimball model are investigated in the small-coupling limit, using nearly degenerate perturbation theory. For rational electron and ion densities, respectively equal to pq , pi q , with p relatively prime to q and pi q close enough to 1 2 , we find that in the ground state the ion configuration has period q. The situation is analogous to the Peier...
متن کاملPhase separation and the segregation principle in the infinite-U spinless Falicov-Kimball model
The simplest statistical-mechanical model of crystalline formation ~or alloy formation! that includes electronic degrees of freedom is solved exactly in the limit of large spatial dimensions and infinite interaction strength. The solutions contain both second-order phase transitions and first-order phase transitions ~that involve phase separation or segregation! which are likely to illustrate t...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2002
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.66.033102