Double moiré with a twist: super-moiré in encapsulated graphene
arXiv:1910.00345 · doi:10.1021/acs.nanolett.9b04058
Abstract
A periodic spatial modulation, as created by a moiré pattern, has been extensively studied with the view to engineer and tune the properties of graphene. Graphene encapsulated by hexagonal boron nitride (hBN) when slightly misaligned with the top and bottom hBN layers experiences two interfering moiré patterns, resulting in a so-called super-moiré (SM). This leads to a lattice and electronic spectrum reconstruction. A geometrical construction of the non-relaxed SM patterns allows us to indicate qualitatively the induced changes in the electronic properties and to locate the SM features in the density of states and in the conductivity. To emphasize the effect of lattice relaxation, we report band gaps at all Dirac-like points in the hole doped part of the reconstructed spectrum, which are expected to be enhanced when including interaction effects. Our result is able to distinguish effects due to lattice relaxation and due to the interfering SM and provides a clear picture on the origin of recently experimentally observed effects in such trilayer heterostuctures.
17 pages, 8 figures, uses iopart.class, Supplementary information
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Cited by in corpus (9)
- Moiré Commensurability and the Quantum Anomalous Hall Effect in Twisted Bilayer Graphene on Hexagonal Boron Nitride
- Electron-hole asymmetry and band gaps of commensurate double moire patterns in twisted bilayer graphene on hexagonal boron nitride
- Enhanced electron-phonon coupling in doubly aligned hexagonal boron nitride bilayer graphene heterostructure
- Moire Band Structures of the Double twisted Few Layer Graphene
- Electric field-tunable layer polarization in graphene/boron nitride twisted quadrilayer superlattices
- Moiré effects in graphene--hBN heterostructures
- Emergence of strain-induced moiré patterns and pseudo-magnetic field confined states in graphene
- Moiré Imaging in Twisted Bilayer Graphene Aligned on Hexagonal Boron Nitride
- Experimental realisation of Dual Periodicity Moiré Superlattice in a MoSe/WSe Heterobilayer