Scattering between Minivalleys in Twisted Double Bilayer Graphene

Petar Tomić, Peter Rickhaus, Aitor García-Ruiz Fuentes, Giulia Zheng, Elías Portoles, Vladimir Fal'ko, Kenji Watanabe, Takashi Taniguchi, Klaus Ensslin, Thomas Ihn, Folkert K. de Vries

Research output: Contribution to journalArticlepeer-review

Abstract

A unique feature of the complex band structures of moiré materials is the presence of minivalleys, their hybridization, and scattering between them. Here, we investigate magnetotransport oscillations caused by scattering between minivalleys—a phenomenon analogous to magnetointersubband oscillations—in a twisted double bilayer graphene sample with a twist angle of 1.94°. 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.
Original languageEnglish
JournalPhysical Review Letters
DOIs
Publication statusPublished - 2022

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