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2008 | 113 | 1 | 291-294
Article title

The Influence of Lattice Defects on the Ground-State Properties of the Falicov-Kimball Model in Two Dimensions

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EN
Abstracts
EN
The influence of lattice defects (vacancies) on the ground-state properties of the spinless Falicov-Kimball model is studied by a well-controlled numerical method in two dimensions. It is shown that in the presence of vacancies (distributed randomly) the ground states of the Falicov-Kimball model are phase separated for small f-electron concentrations n_f and exhibit the long-range order for n_f near the half-filled band case n_f=1/2. In addition, the dependence of average f-orbital occupancy on the concentration of vacancies is calculated for a wide range of model parameters. The resultant behaviours are used to interpret the experimental data obtained for the mixed-valence system Sm_{1-x}B_6.
Keywords
Year
Volume
113
Issue
1
Pages
291-294
Physical description
Dates
published
2008-01
received
2007-07-09
References
  • 1. . L.M. Falicov, J.C. Kimball, Phys. Rev. Lett. 22, 997 (1969)
  • 2. P. Farkašovský, Phys. Rev. B 52, 5463 (1995)
  • 3. R. Lemański, J.K. Freericks, G. Banach, Phys. Rev. Lett. 89, 196403 (2002);C.D. Batista, Phys. Rev. Lett. 89, 166403 (2002)
  • 4. Yu.B. Paderno, E.S. Konovalova, N.L. Baturinskaya, E.M. Dudnik, L.D. Finkelschtein, N.N. Efremova, IAN SSSR Neorg. Mater. 18, 47 (1982)
  • 5. E.V. Nefedevova, P.A. Alekseev, E.S. Klementev, V.N. Lazukov, I.P. Sadikov, M.N. Khlopkin, M.B. Tsetlin, E.S. Konovalova, Yu.B. Paderno, JETP 88, 565 (1999)
  • 6. P. Farkašovský, Eur. Phys. J. B 20, 209 (2001)
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1071kz
Identifiers
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