Saturated ferromagnetism from statistical transmutation in two dimensions.
The total spin of the ground state is calculated in the U-->infinity Hubbard model with uniform magnetic flux perpendicular to a square lattice, in the absence of Zeeman coupling. It is found that the saturated ferromagnetism emerges in a rather wide region in the space of the flux density phi and the electron density ne. In particular, the saturated ferromagnetism at phi=ne is induced by the formation of a spin-1/2 boson, which is a composite of an electron and the unit flux quantum.
Department of Physics, Nagoya University, Nagoya 464-8602, Japan.
Yasuhiro
Y
Saiga
Masaki
M
Oshikawa