- Tytuł:
- On Stability of Frustrated Quantum Magnetic States in Fullerenes
- Autorzy:
-
Koper, A.
Mucha, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1964713.pdf
- Data publikacji:
- 1997-08
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
74.70.Wz
61.46.+w
71.10.-w
71.27.+a
75.10.Jm
02.50.Ng
02.70.Lq - Opis:
- Gutzwiller variational ground states |Φ$\text{}^{G}$⟩ of π electrons, described by single-band half-filling Hubbard model, were determined for the molecules C$\text{}_{60}$ and C$\text{}_{70}$ and their energies and magnetic properties investigated. To construct these states two types of trial functions were used: generalized spin-density wave |Φ$\text{}_{SD}$⟩ and tight-binding wave |Φ$\text{}_{ΤΒ}$⟩. Our results evidently show that the Gutzwiller state |Φ$\text{}_{TΒ}^{G}$⟩ determined by means of function |Φ$\text{}_{ΤΒ}$⟩ has lower energy than the other investigated variational states |Φ$\text{}_{SD}^{G}$⟩. Mean values of the operators in the Gutzwiller states were calculated using Monte Carlo method.
- Źródło:
-
Acta Physica Polonica A; 1997, 92, 2; 395-398
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł