- Tytuł:
- 2D Falicov-Kimball Model in the Perturbative Regime at Finite Temperatures
- Autorzy:
- Dębski, L.
- Powiązania:
- https://bibliotekanauki.pl/articles/1810413.pdf
- Data publikacji:
- 2009-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.10.Hf
75.10.Hk
75.30.Kz
75.40.Mg - Opis:
- Finite-temperature properties of the Falicov-Kimball model in two approximations were studied in the perturbative regime, i.e. for t/U ≪ 1, where t=1 is the hopping constant and U=10 denotes the Coulomb interaction strength. In our study, we determined the phase diagram of the model in the second order of the perturbation theory, where it reduces to the antiferromagnetic Ising model in the emergent magnetic field. In the fourth order, where our model constitutes the Ising model with more complicated frustrated antiferromagnetic interactions, the phase diagram was established. The Monte Carlo method was employed to investigate the phase transition lines. The existence of stripe ordering at finite temperatures is proved.
- Źródło:
-
Acta Physica Polonica A; 2009, 115, 1; 156-158
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki