- Tytuł:
- Magnetic Orderings and Phase Separations in the Zero-Bandwidth Limit of the Extended Hubbard Model with Intersite Magnetic Interactions
- Autorzy:
-
Kłobus, W.
Kapcia, K.
Robaszkiewicz, S. - Powiązania:
- https://bibliotekanauki.pl/articles/1537056.pdf
- Data publikacji:
- 2010-08
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.10.Fd
75.10.-b
75.30.Gw
64.75.Gh
71.10.Hf - Opis:
- A simple effective model for a description of magnetically ordered insulators is analysed. The tight binding Hamiltonian consists of the effective on-site interaction (U) and intersite magnetic exchange interactions $(J^{z}, J^{xy})$ between nearest neighbours. The phase diagrams of this model have been determined within the variational approach, which treats the on-site interaction term exactly and the intersite interactions within the mean-field approximation. We show that, depending on the values of interaction parameters and the electron concentration, the system can exhibit not only homogeneous phases: (anti-)ferromagnetic $(F_α)$ and nonordered (NO), but also phase separated states $(PS_α: F_α-NO)$.
- Źródło:
-
Acta Physica Polonica A; 2010, 118, 2; 353-355
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł