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- W3134233040 abstract "We study the phases of hard-core-bosons on a two-dimensional periodic honeycomb lattice in the presence of an on-site potential with alternating sign along the different y-layers of the lattice. Using quantum Monte Carlo simulations supported by analytical calculations, we identify a weak topological insulator, characterized by a zero Chern number but non-zero Berry phase, which is manifested at either density 1/4 or 3/4, as determined by the potential pattern. Additionally, a charge-density-wave insulator is observed at 1/2-filling, whereas the phase diagram at intermediate densities is occupied by a superfluid phase. The weak topological insulator is further shown to be robust against any amount of nearest-neighbor repulsion, as well as weak next-nearest-neighbor repulsion. The experimental realization of our model is feasible in an optical lattice setup." @default.
- W3134233040 created "2021-03-15" @default.
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- W3134233040 date "2021-03-09" @default.
- W3134233040 modified "2023-10-16" @default.
- W3134233040 title "Weak topological insulating phases of hard-core-bosons on the honeycomb lattice" @default.
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- W3134233040 doi "https://doi.org/10.21468/scipostphys.10.3.059" @default.
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