Enlarging the variational cluster in mean-field theory reveals additional incompressible phases of hard-core bosons on the square-kagome lattice, including a robust 3/4-density plateau corresponding to half-magnetization.
Sutherland, Localization of electronic wave functions due to local topology, Physical Review B34, 5208 (1986)
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Landscape of incompressible crystals of hard-core bosons on the square-kagome lattice
Enlarging the variational cluster in mean-field theory reveals additional incompressible phases of hard-core bosons on the square-kagome lattice, including a robust 3/4-density plateau corresponding to half-magnetization.