Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl

PL EN


Preferences help
enabled [disable] Abstract
Number of results
2012 | 121 | 5-6 | 1035-1037

Article title

On the Phase Diagram of the Zero-Bandwidth Extended Hubbard Model with Intersite Magnetic Interactions for Strong On-Site Repulsion Limit

Content

Title variants

Languages of publication

EN

Abstracts

EN
In this report we have analyzed a simple effective model for a description of magnetically ordered insulators. The Hamiltonian considered consists of the effective on-site interaction (U) and the intersite Ising-like magnetic exchange interaction (J) between nearest neighbors. For the first time the phase diagrams of this model have been determined within Monte Carlo simulation on 2D-square lattice. They have been compared with results obtained within variational approach, which treats the on-site term exactly and the intersite interactions within mean-field approximation. We show within both approaches that, depending on the values of interaction parameters and the electron concentration, the system can exhibit not only homogeneous phases: (anti-)ferromagnetic (F) and nonordered (NO), but also phase separated states (PS: F-NO).

Keywords

Contributors

author
  • Electron States of Solids Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
  • Electron States of Solids Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
  • Electron States of Solids Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
  • Electron States of Solids Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

  • 1. R. Micnas, J. Ranninger, S. Robaszkiewicz, Rev. Mod. Phys. 62, 113 (1990)
  • 2. G.I. Japaridze, E. Muller-Hartmann, Phys. Rev. B 61, 9019 (2000)
  • 3. C. Dziurzik, G.I. Japaridze, A. Schadschneider, J. Zittartz, Eur. Phys. J. B 37, 453 (2004)
  • 4. W. Czart, S. Robaszkiewicz, Phys. Status Solidi B 243, 151 (2006); Mater. Sci. - Poland 25, 485 (2007)
  • 5. H. Barz, Mater. Res. Bull. 8, 983 (1973)
  • 6. A.K. Rastogi, A. Berton, J. Chaussy, R. Tournier, H. Patel, R. Chevrel, M. Sergent, J. Low Temp. Phys. 52, 539 (1983)
  • 7. S. Lamba, A.K. Rastogi, D. Kumar, Phys. Rev. B 56, 3251 (1997)
  • 8. U. Brandt, J. Stolze, Z. Phys. B 62, 433 (1986); J. Jędrzejewski, Physica A 205, 702 (1994)
  • 9. S. Robaszkiewicz, Acta Phys. Pol. A 55, 453 (1979); Phys. Status Solidi B 70, K51 (1975)
  • 10. W. Kłobus, K. Kapcia, S. Robaszkiewicz, Acta Phys. Pol. A 118, 353 (2010)
  • 11. W. Kłobus, M.Sc. Thesis, Adam Mickiewicz University, Poznań 2009; Sz. Murawski, M.Sc. Thesis, Adam Mickiewicz University, Poznań 2010
  • 12. K. Kapcia, W. Kłobus, Sz. Murawski, S. Robaszkiewicz, in preparation
  • 13. G. Pawłowski, Eur. Phys. J. B 53, 471 (2006)

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.bwnjournal-article-appv121n5-6p13kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.