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- W2945693586 abstract "We introduce and study a minimum two-orbital Hubbard model on a triangular lattice, which captures the key features of both the trilayer ABC-stacked graphene-boron nitride heterostructure and twisted transition metal dichalcogenides in a broad parameter range. Our model comprises first- and second-nearest neighbor hoppings with valley-contrasting flux that accounts for trigonal warping in the band structure. For the strong-coupling regime with one electron per site, we derive a spin-orbital exchange Hamiltonian and find the semiclassical ground state to be a spin-valley density wave. We show that a relatively small second-neighbor exchange interaction is sufficient to stabilize the ordered state against quantum fluctuations. Effects of spin- and valley Zeeman fields as well as thermal fluctuations are also examined." @default.
- W2945693586 created "2019-05-29" @default.
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- W2945693586 date "2019-07-10" @default.
- W2945693586 modified "2023-10-02" @default.
- W2945693586 title "Spin-valley density wave in moiré materials" @default.
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- W2945693586 doi "https://doi.org/10.1103/physrevb.100.035413" @default.
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