TY - JOUR
T1 - Scattering between Minivalleys in Twisted Double Bilayer Graphene
AU - Tomić, Petar
AU - Rickhaus, Peter
AU - García-Ruiz Fuentes, Aitor
AU - Zheng, Giulia
AU - Portoles, Elías
AU - Fal'ko, Vladimir
AU - Watanabe, Kenji
AU - Taniguchi, Takashi
AU - Ensslin, Klaus
AU - Ihn, Thomas
AU - K. de Vries, Folkert
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
U2 - 10.1103/PhysRevLett.128.057702
DO - 10.1103/PhysRevLett.128.057702
M3 - Article
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
ER -