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Exact Plaquette-Ordered Ground States with Exact Edge States of the Generalized Hubbard Model in Corner Sharing Lattices

We discuss exact plaquette-ordered ground states of the generalized Hubbard model based on the projection operator method for several corner sharing lattices: Kagome, checkerboard, and pyrochlore lattices. The obtained exact ground states are interpreted as Néel ordered states on the plaquette-located electrons. We demonstrate that these models also have exact edge states. We also calculate the entanglement entropy exactly in these systems.

preprint2020arXivOpen access
Naoto NakatsujiSatoshi NishimotoMasaaki Nakamura
cond-mat.str-el
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Naoto NakatsujiSatoshi NishimotoMasaaki Nakamura

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