On Stability of Frustrated Quantum Magnetic States in Fullerenes

• Authors: A. Koper , M. Mucha
• Languages of publication: EN

Abstracts

EN

Gutzwiller variational ground states |Φ^{G}⟩ of π electrons, described by single-band half-filling Hubbard model, were determined for the molecules C_{60} and C_{70} and their energies and magnetic properties investigated. To construct these states two types of trial functions were used: generalized spin-density wave |Φ_{SD}⟩ and tight-binding wave |Φ_{ΤΒ}⟩. Our results evidently show that the Gutzwiller state |Φ^{G}_{TΒ}⟩ determined by means of function |Φ_{ΤΒ}⟩ has lower energy than the other investigated variational states |Φ^{G}_{SD}⟩. Mean values of the operators in the Gutzwiller states were calculated using Monte Carlo method.

Keywords

EN

74.70.Wz; 61.46.+w; 71.10.-w; 71.27.+a; 75.10.Jm; 02.50.Ng; 02.70.Lq

Discipline

• 02.50.Ng: Distribution theory and Monte Carlo studies
• 74.70.Wz: Carbon-based superconductors
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 71.10.-w: Theories and models of many-electron systems
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 2
• Pages: 395-398

Dates

published

1997-08

Contributors

author

A. Koper

• Institute of Physics, A. Mickiewicz University, Matejki 48/49, 60-769 Ρoznań, Poland

author

M. Mucha

• Institute of Physics, A. Mickiewicz University, Matejki 48/49, 60-769 Ρoznań, Poland

Identifiers

DOI

10.12693/APhysPolA.92.395