Research paperTheoreticalComputed RamanElectric field-tunable layer polarization in graphene/boron nitride twisted quadrilayer superlatticesZiyan Zhu, Stephen Carr, Qiong Ma, Efthimios KaxirasarXiv preprint·2022·10.1103/PhysRevB.106.205134·arXiv:2209.10636AbstractWe present a low-energy continuum model for AB bilayer graphene encapsulated by top and bottom layers of hBN or graphene, with two independent twist angles. For graphene/hBN heterostructures, twist-angle asymmetry leads to layer polarization of the valence and conduction bands, and an out-of-plane displacement field tunes the layer polarization and flattens the low-energy bands. The model is extended to quadrilayer graphene heterostructures encapsulated by graphene, whose electronic structure is also tunable by an external electric field.Read more
Twisted quadrilayer heterostructure consisting of AB bilayer graphene encapsulated by top and bottom hBN layers with two independent twist angles.1 propertySimulatedCStudied MaterialBNStudied MaterialExpand
Quadrilayer graphene heterostructure consisting of AB bilayer graphene encapsulated by top and bottom monolayer graphene layers.No measurements recordedSimulatedCStudied MaterialExpand
Research paperTheoreticalComputed RamanElectric field-tunable layer polarization in graphene/boron nitride twisted quadrilayer superlatticesZiyan Zhu, Stephen Carr, Qiong Ma, Efthimios KaxirasarXiv preprint·2022·10.1103/PhysRevB.106.205134·arXiv:2209.10636AbstractWe present a low-energy continuum model for AB bilayer graphene encapsulated by top and bottom layers of hBN or graphene, with two independent twist angles. For graphene/hBN heterostructures, twist-angle asymmetry leads to layer polarization of the valence and conduction bands, and an out-of-plane displacement field tunes the layer polarization and flattens the low-energy bands. The model is extended to quadrilayer graphene heterostructures encapsulated by graphene, whose electronic structure is also tunable by an external electric field.Read more
Twisted quadrilayer heterostructure consisting of AB bilayer graphene encapsulated by top and bottom hBN layers with two independent twist angles.1 propertySimulatedCStudied MaterialBNStudied MaterialExpand
Quadrilayer graphene heterostructure consisting of AB bilayer graphene encapsulated by top and bottom monolayer graphene layers.No measurements recordedSimulatedCStudied MaterialExpand
Research paperTheoreticalComputed RamanElectric field-tunable layer polarization in graphene/boron nitride twisted quadrilayer superlatticesZiyan Zhu, Stephen Carr, Qiong Ma, Efthimios KaxirasarXiv preprint·2022·10.1103/PhysRevB.106.205134·arXiv:2209.10636AbstractWe present a low-energy continuum model for AB bilayer graphene encapsulated by top and bottom layers of hBN or graphene, with two independent twist angles. For graphene/hBN heterostructures, twist-angle asymmetry leads to layer polarization of the valence and conduction bands, and an out-of-plane displacement field tunes the layer polarization and flattens the low-energy bands. The model is extended to quadrilayer graphene heterostructures encapsulated by graphene, whose electronic structure is also tunable by an external electric field.Read more
Twisted quadrilayer heterostructure consisting of AB bilayer graphene encapsulated by top and bottom hBN layers with two independent twist angles.1 propertySimulatedCStudied MaterialBNStudied MaterialExpand
Quadrilayer graphene heterostructure consisting of AB bilayer graphene encapsulated by top and bottom monolayer graphene layers.No measurements recordedSimulatedCStudied MaterialExpand
Research paperTheoreticalComputed RamanElectric field-tunable layer polarization in graphene/boron nitride twisted quadrilayer superlatticesZiyan Zhu, Stephen Carr, Qiong Ma, Efthimios KaxirasarXiv preprint·2022·10.1103/PhysRevB.106.205134·arXiv:2209.10636AbstractWe present a low-energy continuum model for AB bilayer graphene encapsulated by top and bottom layers of hBN or graphene, with two independent twist angles. For graphene/hBN heterostructures, twist-angle asymmetry leads to layer polarization of the valence and conduction bands, and an out-of-plane displacement field tunes the layer polarization and flattens the low-energy bands. The model is extended to quadrilayer graphene heterostructures encapsulated by graphene, whose electronic structure is also tunable by an external electric field.Read more
Twisted quadrilayer heterostructure consisting of AB bilayer graphene encapsulated by top and bottom hBN layers with two independent twist angles.1 propertySimulatedCStudied MaterialBNStudied MaterialExpand
Quadrilayer graphene heterostructure consisting of AB bilayer graphene encapsulated by top and bottom monolayer graphene layers.No measurements recordedSimulatedCStudied MaterialExpand