INVESTIGADORES
TAMARIT Francisco
artículos
Título:
A generalised Hubbard Hamiltonian : Influence of temperature and fractality
Autor/es:
SERGIO CANNAS; FRANCISCO TAMARIT; CONSTANTINO TSALLIS
Revista:
SOLID STATE COMMUNICATIONS
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 1991 vol. 78 p. 685 - 690
ISSN:
0038-1098
Resumen:
We consider a generalised Hubbard Hamiltonian which is invariant under a Real Space Renormalisation Group. Within the present approximation, the Bravais lattice is replaced by a diamond-like hierarchical lattice. We calculate the phase diagram associated with the half-filled band Hubbard Hamiltonian in d = 1, 2 and 3, in the full range of the dimensionless intra-atomic interaction U and hopping t parameters. The influence of the hierarchical lattice fractality is analysed as well.
