Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations

Twisted bilayer graphene (TBG) provides an example of a system in which the interplay interlayer interactions and superlattice structure impacts electron transport variety non-trivial ways gives rise to plethora interesting effects. Understanding mechanisms scattering TBG has, however, proven challenging, raising many questions about origins resistivity this system. Here we show that exhibits high-temperature magnetooscillations originating from charge carriers between minivalleys. The amplitude these oscillations reveals interminivalley is strong, its characteristic time scale comparable intraminivalley counterpart. Furthermore, by exploring temperature dependence oscillations, estimate electron-electron collision rate find it exceeds monolayer graphene. Our study demonstrates consequences relatively small size Brillouin zone Fermi velocity reduction on lateral TBG.