- Tytuł:
- Magnetic Properties of the Hubbard Model on Kagome Stripes
- Autorzy:
-
Derzhko, O.
Maksymenko, M.
Richter, J.
Honecker, A.
Moessner, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1506953.pdf
- Data publikacji:
- 2010-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 71.10.-w
- Opis:
- We consider the one-orbital N-site repulsive Hubbard model on two kagome like chains, both of which yield a completely dispersionless (flat) one-electron band. Using exact many-electron ground states in the subspaces with n ≤ $n_\text{max}$ ($n_\text{max}$ ∝ N) electrons, we calculate the square of the total spin in the ground state to discuss magnetic properties of the models. We have found that although for n < n_{max} the ground states contain fully polarized states, there is no finite region of electron densities n/$\mathcal{N}$ < 1 ($\mathcal{N}$ = N/3 or $\mathcal {N}$ = N/5) where ground-state ferromagnetism survives for $\mathcal {N}$ → ∞.
- Źródło:
-
Acta Physica Polonica A; 2010, 118, 5; 736-737
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł