arXiv:cond-mat/0304295 · Journal of Physics A Mathematical and General
An extension of Tasaki's flat-band Hubbard model
Teppei Sekizawa
Published Oct 8, 2003• 8 citations
Abstract
We present a new class of flat-band Hubbard models which have saturated ferromagnetic ground states at two distinct electron numbers for different values of parameters. The models are extensions of Tasaki's flat-band models.