WebAug 22, 2024 · In the presence of short-range repulsion, we find fractional Chern insulators emerge at filling factors $\nu=1/m$, whose ground states are generalized Laughlin wavefunctions. We further argue that generalized Wigner crystals may emerge at certain commensurate fillings under a highly nonuniform magnetic field in the form of a flux line … WebNov 18, 2024 · This band carries a spin/valley Chern number and is well described by a generalized Kane−Mele model 33. At half filling of this topological flat band, we show that repulsive interactions...
[1912.11469] Chern bands of twisted bilayer graphene: fractional …
WebSystems with a flat Chern band have been extensively studied for their potential to realize high-temperature fractional quantum Hall states. To experimentally observe the quantum transport... WebAug 5, 2024 · In two-dimensional flat-band systems with Cn symmetry, when the degeneracy of a SR-enforced band crossing is lifted by a Cn symmetry-preserving perturbation, we obtain a nearly flat Chern band. phim more than friend
Nearly flat band with Chern number C=2 on the dice lattice
WebFeb 22, 2024 · We point out the possibility of a nearly flat band with Chern number C=2 on the dice lattice in a simple nearest-neighbor tightbinding model. This lattice can be naturally formed by three adjacent (111) layers of cubic lattice, which may be realized in certain thin films or artificial heterostructures, such as the SrTiO3/SrIrO3/SrTiO3 trilayer … WebJan 15, 2024 · The valley Chern numbers of the two nearly flat bands in the twisted TLG depends on the twist angle θ and the perpendicular electric field E ⊥. Considering its topological flat bands, the twisted TLG should be an ideal experimental platform to study the strongly correlated physics in topologically nontrivial flat band systems. WebFeb 24, 2024 · A flat Chern band is found at a “magic” value of magnetization m ¯ ∼ 0.2 for Schrödinger electrons, and it generally occurs for Dirac electrons. The magnetic … tsl urban homes ltd