Ferromagnetism in Hubbard Chains

• Authors: M. Cuoco , C. Noce , A. Romano
• Languages of publication: EN

Abstracts

EN

We analyze the possible occurrence of ferromagnetism in the Hubbard model, by means of an exact diagonalization study performed on 3- to 8-site chains with periodic boundary conditions. In the case of one hole in the half-filled configuration, we find that the Nagaoka state is reached only in the 3- and in the 4-site case. Ground states characterized by unsaturated ferromagnetism are found when the case of more than one hole is considered.

Keywords

EN

71.10.Fd; 75.10.Lp

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 91
• Issue: 2
• Pages: 387-390

Dates

published

1997-02

Contributors

author

M. Cuoco

• Unità I.N.F.M. di Salerno - Dipartimento di Fisica Teorica e S.M.S.A., Università di Salerno, 84081 Baronissi (Salerno), Italy

author

C. Noce

• Unità I.N.F.M. di Salerno - Dipartimento di Fisica Teorica e S.M.S.A., Università di Salerno, 84081 Baronissi (Salerno), Italy

author

A. Romano

• Unità I.N.F.M. di Salerno - Dipartimento di Fisica Teorica e S.M.S.A., Università di Salerno, 84081 Baronissi (Salerno), Italy