Abstract:
A new numerical method is used to study the ground-state properties of the spinless Falicov-Kimball model in one and two dimensions. The resultant solutions are used to examine the phase diagram of the model as well as possibilities for valence and metal-insulator transitions. In one dimension a comprehensive phase diagram of the model is presented. On the base of this phase diagram, the complete picture of valence and metal-insulator transitions is discussed. In two dimensions the structure of ground-state configurations is described for intermediate interactions between f and d electrons. In this region the phase separation and metal-insulator transitions are found at low f-electron concentrations. It is shown that valence transitions exhibit a staircase structure.
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Received 20 October 2000
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Farkašovský, P. Ground-state properties of the Falicov-Kimball model in one and two dimensions. Eur. Phys. J. B 20, 209–215 (2001). https://doi.org/10.1007/s100510170270
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DOI: https://doi.org/10.1007/s100510170270