Electric field tunable layer polarization in graphene/boron-nitride twisted quadrilayer superlattices
Electric field tunable layer polarization in graphene/boron-nitride twisted quadrilayer superlattices
The recently observed unconventional ferroelectricity in AB bilayer graphene sandwiched by hexagonal boron nitride (hBN) presents a new platform to manipulate correlated phases in multilayered van der Waals heterostructures [Zheng et al., Nature 588, 71 (2020).]. We present a low-energy continuum model for AB bilayer graphene encapsulated by the top …