{"paper":{"title":"Extended Falicov-Kimball model: Exact solution for finite temperatures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other","cond-mat.stat-mech","physics.comp-ph"],"primary_cat":"cond-mat.str-el","authors_text":"Konrad Jerzy Kapcia, Romuald Lema\\'nski, Stanis{\\l}aw Robaszkiewicz","submitted_at":"2019-03-19T16:26:14Z","abstract_excerpt":"The extended Falicov-Kimball model is analyzed exactly for finite temperatures ($T\\geq0$) in the limit of large dimensions. Onsite and intersite density-density interactions $U$ and $V$ are included in the model. Using the dynamical mean field theory formalism on the Bethe lattice we find rigorously the temperature dependent density of states (DOS) at half-filling. At $T=0$ the system is ordered to form the checkerboard pattern and the DOS has the gap $\\Delta(\\varepsilon_F) > 0$ at the Fermi level, if only $U\\neq 0$ or $V\\neq 0$. If $U <0$ or $U > 2V$, two additional subbands develop inside th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.08092","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}