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Scattering between minivalleys in a moir\'e material

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arxiv 2106.07805 v1 pith:THHW2AOF submitted 2021-06-14 cond-mat.mes-hall

Scattering between minivalleys in a moir\'e material

Petar Tomi\'c , Peter Rickhaus , Aitor Garcia-Ruiz , Giulia Zheng , El\'ias Portol\'es , Vladimir Fal'ko , Kenji Watanabe , Takashi Taniguchi
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Klaus Ensslin Thomas Ihn Folkert K. de Vries
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classification cond-mat.mes-hall
keywords scatteringminivalleysdiscussmaterialsmoiroscillationstwistanalogous
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A unique feature of the complex band structures of moir\'e materials is the presence of minivalleys, their hybridization, and scattering between them. Here we investigate magneto-transport oscillations caused by scattering between minivalleys - a phenomenon analogous to magneto-intersubband oscillations - in a twisted double bilayer graphene sample with a twist angle of 1.94{\deg}. We study and discuss the potential scattering mechanisms and find an electron-phonon mechanism and valley conserving scattering to be likely. Finally, we discuss the relevance of our findings for different materials and twist angles.

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