- Tytuł:
- Exact Diagonalization Study of an Extended Hubbard Model for a Cubic Cluster at Quarter Filling
- Autorzy:
-
Szałowski, K.
Balcerzak, T.
Jaščur, M.
Bobák, A.
Žukovič, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1032794.pdf
- Data publikacji:
- 2017-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.40.Cx
75.75.-c
75.10.Lp
71.27.+a
65.80.-g
05.70.Ce - Opis:
- In the paper the thermodynamics of a cubic cluster with 8 sites at quarter filling is characterized by means of exact diagonalization technique. Particular emphasis is put on the behaviour of such response functions as specific heat and magnetic susceptibility. The system is modelled with extended Hubbard model which includes electron hopping between both first and second nearest neighbours as well as Coulombic interactions, both on-site and between nearest-neighbour sites. The importance of hopping between second nearest neighbours and Coulombic interactions between nearest neighbours for the temperature dependences of thermodynamic response functions is analysed. In particular, the predictions of the Schottky model are compared with the calculations based on the full energy spectrum.
- Źródło:
-
Acta Physica Polonica A; 2017, 131, 4; 1012-1014
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł