Two-Dimensional Bose-Hubbard Model for Helium on Graphene
Jiangyong Yu,
Ethan Lauricella,
Mohamed Elsayed
et al.
Abstract:An exciting development in the field of correlated systems is the possibility of realizing twodimensional (2D) phases of quantum matter. For a systems of bosons, an example of strong correlations manifesting themselves in a 2D environment is provided by helium adsorbed on graphene. We construct the effective Bose-Hubbard model for this system which involves hard-core bosons (U ≈ ∞), repulsive nearest-neighbor (V > 0) and small attractive (V < 0) next-nearest neighbor interactions. The mapping onto the Bose-Hub… Show more
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