The two-dimensional t-t′-U model has been studied by means of the composite operator method. We have found that the intensity of the t′ parameter controls the topology of the Fermi surface, the structure of the density of states and the position of the van Hove singularity.
Fermi surface and density of states in the two-dimensional t-t`-U model
AVELLA, Adolfo;MANCINI, Ferdinando;
1997-01-01
Abstract
The two-dimensional t-t′-U model has been studied by means of the composite operator method. We have found that the intensity of the t′ parameter controls the topology of the Fermi surface, the structure of the density of states and the position of the van Hove singularity.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
