Exact solutions of domain wall and spiral ground states in Hubbard models

Details Exact solutions of domain wall and spiral ground states in Hubbard models Exact solutions of domain wall and spiral ground states in Hubbard models

2002-10-31

arxiv.org/abs/cond-mat/0210691v3

J.Phys.Soc.Jap. 73 (2004) 499-502

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures. To be published in J. Phys. Soc. Jpn. 73 (2004)

Scientific paper

10.1143/JPSJ.73.499

We construct a set of exact ground states with a localized ferromagnetic domain wall and an extended spiral structure in a deformed flat-band Hubbard model. In the case of quarter filling, we show the uniqueness of the ground state with a fixed magnetization. We discuss more realistic situation given by a band-bending perturbation, which can stabilize these curious structures. We study the scattering of a conduction electron by the domain wall and the spiral spins.

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