- Tytuł:
- Ground-state spin of Hubbard ladder model with infinite electron repulsion
- Autorzy:
-
Cheranovskii, V.
Ezerskaya, E.
Klein, D.
Tokarev, V. - Powiązania:
- https://bibliotekanauki.pl/articles/1054813.pdf
- Data publikacji:
- 2017-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.10.Fd
75.10.Jm - Opis:
- We apply perturbation theory and cyclic spin permutation formalism to study the lowest energy states of the infinite-repulsion Hubbard model on n-leg ladders with alternating values of one-site energies α_{i} for neighboring rungs. We establish the "ferromagnetic" character of ladder ground-state at electron densities in the interval 1 - (2n)¯¹ ≤ ρ ≤ 1 and sufficiently large alternation of one-site energies of neighbor rungs of the ladder. We also show the stability of this state against the small deviations of the values of α_{i} in contrast to the case of two-leg ladder formed by weakly interacting neighbor rungs with equal one-site energies.
- Źródło:
-
Acta Physica Polonica A; 2017, 131, 4; 916-918
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł