An extension of Tasaki's flat-band Hubbard model
Teppei Sekizawa; Teppei Sekizawa; Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
Журнал:
Journal of Physics A: Mathematical and General
Дата:
2003-10-24
Аннотация:
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.
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