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most citedSolar System constraints to general f(R) gravity

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cond-mat.str-el2004

Gapless Excitation above a Domain Wall Ground State in a Flat Band Hubbard Model

Makoto Homma, Chigak Itoi

We construct a set of exact ground states with a localized ferromagnetic domain wall and with an extended spiral structure in a deformed flat-band Hubbard model in arbitrary dimens…