Commensurate and incommensurate double moire interference in graphene encapsulated by hexagonal boron nitride

@article{Leconte2019CommensurateAI,
  title={Commensurate and incommensurate double moire interference in graphene encapsulated by hexagonal boron nitride},
  author={Nicolas Leconte and Jun Jung},
  journal={2D Materials},
  year={2019},
  volume={7}
}
Interference of double moire patterns of graphene (G) encapsulated by hexagonal boron nitride (BN) can alter the electronic structure features near the primary/secondary Dirac points and the electron-hole symmetry introduced by a single G/BN moire pattern depending on the relative stacking arrangements of the top/bottom BN layers. We show that strong interference effects are found in nearly aligned BN/G/BN and BN/G/NB and obtain the evolution of the associated density of states as a function of… 

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References

SHOWING 1-10 OF 42 REFERENCES

Double moiré with a twist: super-moiré in encapsulated graphene.

This work 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.

Tunable crystal symmetry in graphene–boron nitride heterostructures with coexisting moiré superlattices

The results demonstrate that the interplay between multiple moiré patterns can be utilized to controllably modify the symmetry and electronic properties of the composite heterostructure, enabling tunable crystal symmetry and strong modification of the graphene band structure.

Electronic properties of graphene/hexagonal-boron-nitride moiré superlattice

We theoretically investigate the electronic structures of moir\'e superlattices arising in monolayer/bilayer graphene stacked on hexagonal boron nitride (hBN) in the presence and absence of magnetic

Accurate Gap Determination in Monolayer and Bilayer Graphene/ h-BN Moiré Superlattices.

In single-layer graphene, it is found that gaps are formed at neutrality and at the hole-doped SDP, but not at the electron-dopes, and for bilayer graphene, gaps occur only at charge neutrality where they can be modified by an external electric field.

Correlated Superconducting and Insulating States in Twisted Trilayer Graphene Moire of Moire Superlattices.

Layers of two-dimensional materials stacked with a small twist-angle give rise to beating periodic patterns on a scale much larger than the original lattice, referred to as a "moire superlattice".

Composite super-moiré lattices in double-aligned graphene heterostructures

By using graphene which is aligned to two hexagonal boron nitride layers, one can make electrons scatter in the differential moiré pattern which results in spectral changes at arbitrarily low energies, and it is demonstrated that the strength of this potential relies crucially on the atomic reconstruction of graphene within the differentialMoiré super cell.

Gate-Tunable Topological Flat Bands in Trilayer Graphene Boron-Nitride Moiré Superlattices.

Calculations indicate that valley-spin resolved isolated superlattice flat bands that carry a finite Chern number C=3 proportional to the layer number can appear near charge neutrality for appropriate perpendicular electric fields and twist angles.

Tunable moiré bands and strong correlations in small-twist-angle bilayer graphene

It is demonstrated that at small twist angles, the electronic properties of bilayer graphene moiré crystals are strongly altered by electron–electron interactions.

Structural analysis of multilayer graphene via atomic moiré interferometry

Rotational misalignment of two stacked honeycomb lattices produces a moir\'e pattern that is observable in scanning tunneling microscopy as a small modulation of the apparent surface height. This is

New Generation of Moiré Superlattices in Doubly Aligned hBN/Graphene/hBN Heterostructures

Moiré superlattices in fully hBN encapsulated graphene with both the top and the bottom hBN aligned to the graphene are reported, allowing one to artificially create an even wider spectrum of electronic properties in two-dimensional materials.