INSTABILITY OF THE NAGAOKA FERROMAGNETIC STATE OF THE 2-DIMENSIONAL INFINITE-U HUBBARD-MODEL

Authors
SONG Z
Citation
Z. Song, INSTABILITY OF THE NAGAOKA FERROMAGNETIC STATE OF THE 2-DIMENSIONAL INFINITE-U HUBBARD-MODEL, Physical review. B, Condensed matter, 49(10), 1994, pp. 6723-6725
Citations number
7
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
49
Issue
10
Year of publication
1994
Pages
6723 - 6725
Database
ISI
SICI code
0163-1829(1994)49:10<6723:IOTNFS>2.0.ZU;2-Y
Abstract
A variational wave function with spin zero is presented for the infini te- U Hubbard model on a square lattice with the hole concentration de lta = 0.5. We find that the Nagaoka ferromagnetic state is unstable fo r this caw in the thermodynamic limit. Some discussion about this meth od for other hole concentrations is given.