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(a) Schematics in reciprocal space for the formation of different MSLs, where g⃗, b⃗1, b⃗2, k⃗1, k⃗2, and k⃗3 are one of the reciprocal lattice vectors for graphene, top hBN, bottom hBN, top 2L-MSL, bottom 2L-MSL, and 3L-MSL, respectively. N is an integer, which can be 1, 2, or 3. (b) λ3 plotted as a function of ϕ1 and ϕ2 for all possible twist angles. (c) Zoom-in of (b) for small twist angles. Numbers on the contour lines indicate the values of λ3 in nm.
