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2010 | 118 | 2 | 379-382
Article title

The Falicov-Kimball Model in External Magnetic Field: Orbital Effects

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Abstracts
EN
We study thermodynamic properties of the two-dimensional (2D) Falicov-Kimball model in the presence of external magnetic field perpendicular to the lattice. The field is taken into account by the Peierls substitution in the hopping term. We show how the Hofstadter butterfly is affected by electronic correlations. In the non-interacting case the field dependent energy spectrum forms the famous Hofstadter butterfly. Our results indicate that for arbitrary nonzero interaction strength and arbitrary magnetic field there is a gap in the energy spectrum at sufficiently low temperature. The gap vanishes with increase of temperature for weak coupling, however, it persists at high temperatures if the coupling is strong enough. Numerical results have been obtained with the help of Monte Carlo technique based on a modified Metropolis algorithm.
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Year
Volume
118
Issue
2
Pages
379-382
Physical description
Dates
published
2010-08
Contributors
author
  • Department of Theoretical Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
  • Department of Theoretical Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
author
  • Department of Theoretical Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
References
  • 1. K. Czajka, A. Gorczyca, M.M. Maśka, M. Mierzejewski, Phys. Rev. B 74, 125116 (2006)
  • 2. H. Doh, S.H. Salk, Phys. Rev. B 57, 1312 (1998)
  • 3. C. Gruber, D. Ueltschi, math-ph/0502041
  • 4. C. Gruber, cond-mat/9811299
  • 5. L.M. Falicov, J.C. Kimball, Phys. Rev. Lett. 22, 997 (1969)
  • 6. J.K. Freericks, V. Zlatić, Rev. Mod. Phys. 75, 1333 (2003)
  • 7. T. Kennedy, E. Lieb, Physica A 138, 320 (1986)
  • 8. J.K. Freericks, P. Miller, Phys. Rev. B 62, 10022 (2000)
  • 9. K. Czajka, M.M. Maśka, Physica B 359, 693 (2005)
  • 10. M.M. Maśka, K. Czajka, Phys. Rev. B 74, 035109 (2006)
  • 11. J.K. Freericks, V. Zlatić, Phys. Rev. B 58, 322 (1998); M. Žonda, cond-mat/0606242
  • 12. C. Gruber, N. Marcis, A. Messager, D. Ueltschi, J. Statist. Phys. 86, 57 (1997)
  • 13. R. Lemański, J.K. Freericks, G. Banach, Phys. Rev. Lett. 89, 196403 (2002); K. Czajka, M.M. Maśka, Phys. Status Solidi B 244, 2427 (2007); M.M. Maśka, K. Czajka, Phys. Status Solidi B 242, 479 (2005)
  • 14. M.M. Maśka, Phys. Rev. B 66, 054533 (2002)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n239kz
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