Saturated Ferromagnetism from Statistical Transmutation in Two Dimensions
Abstract
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 φ and the electron density ne. In particular, the saturated ferromagnetism at φ = ne is induced by the formation of a spin-1/2 boson, which is a composite of an electron and the unit flux quantum.
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