- Tytuł:
- Comparison of the Multi-Band Hubbard and Heisenberg Models on Small Finite Clusters
- Autorzy:
-
Matysiak, J.
Lemański, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1030762.pdf
- Data publikacji:
- 2018-03
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
31.15.vq
75.10.Jm
75.10.Pq - Opis:
- We perform exact numeric calculations for a few versions of the two-orbital Hubbard model on the four site cluster. We show that the conventional spin 1 Heisenberg Hamiltonian can be obtained in the strong coupling limit, but only for some versions of the two-orbital Hubbard model. Then we propose a modified version of the Heisenberg Hamiltonian, that we call the two-orbital Heisenberg model, which is relevant in those cases, where the conventional spin 1 Heisenberg model fails.
- Źródło:
-
Acta Physica Polonica A; 2018, 133, 3; 405-407
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł