https://doi.org/10.1140/epjb/e2005-00217-1
Ground-states of the three-dimensional Falicov-Kimball model
Institute of Experimental Physics, Slovak Academy of
Sciences
Watsonova 47, 043 53 Košice, Slovakia
Corresponding author: a farky@saske.sk
Received:
25
January
2005
Revised:
11
April
2005
Published online:
13
July
2005
A systematic study of ground-state properties of the three-dimensional Falicov-Kimball model is performed by a well-controlled numerical method. The results obtained are used to categorize the ground-state configurations according to common features for weak, intermediate and strong interactions. It is shown that only a few configuration types form the basic structure of the phase diagram. In particular, the largest regions of stability correspond to phase segregated configurations, striped configurations and configurations in which electrons are distributed in diagonal planes with incomplete chessboard structure. Near half-filling, mixtures of two phases with complete and incomplete chessboard structure are determined. The relevance of these results for a description of real materials is discussed.
PACS: 75.10.Lp – Band and itinerant models / 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.28.+d – Narrow-band systems; intermediate-valence solids / 71.30.+h – Metal-insulator transitions and other electronic transitions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
