We present the first exact results of the ground-state energy in the two-dimensional Hubbard model on a 4×4 cluster for several values of U and fillings. The behavior of the binding energy of two holes as a function of U is discussed together with some analytical results in limiting cases. The analysis of the hole-hole correlation function allows one to determine the range of values of U where binding might be seen. © 1990 The American Physical Society.

Hole-hole effective interaction in the two-dimensional Hubbard model

PAROLA, ALBERTO
1990-01-01

Abstract

We present the first exact results of the ground-state energy in the two-dimensional Hubbard model on a 4×4 cluster for several values of U and fillings. The behavior of the binding energy of two holes as a function of U is discussed together with some analytical results in limiting cases. The analysis of the hole-hole correlation function allows one to determine the range of values of U where binding might be seen. © 1990 The American Physical Society.
1990
Fano, G; Ortolani, F; Parola, Alberto
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.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/6461
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 79
  • ???jsp.display-item.citation.isi??? 83
social impact