Flat bands and gaps in twisted double bilayer graphene.
Sign Up to like & getrecommendations! Published in 2020 at "Nanoscale"
DOI: 10.1039/c9nr10830k
Abstract: We present electronic structure calculations of twisted double bilayer graphene (TDBG): a tetralayer graphene structure composed of two AB-stacked graphene bilayers with a relative rotation angle between them. Using first-principles calculations, we find that TDBG… read more here.
Keywords: bilayer graphene; twisted double; graphene; flat bands ... See more keywords
Fabry–Pérot cavities and quantum dot formation at gate-defined interfaces in twisted double bilayer graphene
Sign Up to like & getrecommendations! Published in 2021 at "2D Materials"
DOI: 10.1088/2053-1583/ac33c2
Abstract: The rich and electrostatically tunable phase diagram exhibited by moiré materials has made them a suitable platform for hosting single material, multi-purpose devices. To engineer such devices, understanding electronic transport and localization across electrostatically defined… read more here.
Keywords: bilayer graphene; twisted double; fabry rot; defined interfaces ... See more keywords
Topological superconductivity, ferromagnetism, and valley-polarized phases in moiré systems: Renormalization group analysis for twisted double bilayer graphene
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.085103
Abstract: Recent experiments have observed possible spin- and valley-polarized insulators and spin-triplet superconductivity in twisted double bilayer graphene, a moire structure consisting of a pair of Bernal-stacked bilayer graphene. Besides the continuously tunable band widths controlled… read more here.
Keywords: valley polarized; twisted double; bilayer graphene; valley ... See more keywords
Electronic structure of 30∘ twisted double bilayer graphene
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.115123
Abstract: In this paper, the electronic properties of 30° twisted double bilayer graphene, which loses the translational symmetry due to the incommensurate twist angle, are studied by means of the tight-binding approximation. We demonstrate the interlayer… read more here.
Keywords: bilayer graphene; twisted double; graphene; double bilayer ... See more keywords
Correlated Insulating States in Twisted Double Bilayer Graphene.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.197702
Abstract: We present a combined experimental and theoretical study of twisted double bilayer graphene with twist angles between 1° and 1.35°. Consistent with moiré band structure calculations, we observe insulators at integer moiré band fillings one… read more here.
Keywords: bilayer graphene; twisted double; band; double bilayer ... See more keywords
Scattering between Minivalleys in Twisted Double Bilayer Graphene.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.128.057702
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… read more here.
Keywords: bilayer graphene; double bilayer; scattering minivalleys; twisted double ... See more keywords
Kinematic Properties of a Twisted Double Planetary Chaotic Mixer: A Three-Dimensional Numerical Investigation
Sign Up to like & getrecommendations! Published in 2022 at "Micromachines"
DOI: 10.3390/mi13091545
Abstract: In this study, a numerical investigation based on the CFD method is carried out to study the unsteady laminar flow of Newtonian fluid with a high viscosity in a three-dimensional simulation of a twisted double… read more here.
Keywords: twisted double; numerical investigation; three dimensional; double planetary ... See more keywords