John Wallbank

TL;DR: Graphene superlattices such as this one provide a way of studying the rich physics expected in incommensurable quantum systems and illustrate the possibility of controllably modifying the electronic spectra of two-dimensional atomic crystals by varying their crystallographic alignment within van der Waals heterostuctures.

TL;DR: It is demonstrated how careful alignment of the crystallographic orientation of two graphene electrodes separated by a layer of hexagonal boron nitride in a transistor device can achieve resonant tunnelling with conservation of electron energy, momentum and, potentially, chirality.

TL;DR: In this paper, a general symmetry-based approach was used to identify conditions at which the first moire miniband is separated from the rest of the spectrum by either one or a group of three isolated mini Dirac points and is not obscured by dispersion surfaces coming from other minibands.

TL;DR: In this article, the transverse electron focusing effect was investigated in high temperatures and at high temperatures, electron-electron collisions suppress focusing, and the authors observed caustics of skipping orbits extending over hundreds of superlattice periods, reversals of the cyclotron revolution for successive minibands, and breakdown of cyclotic motion near van Hove singularities.

TL;DR: This work demonstrates coherent electronic transport in a lattice of topologically protected states in the moiré crystal of minimally twisted bilayer graphene and observes Fabry-Pérot and Aharanov-Bohm oscillations that are robust in magnetic fields, indicating that charge carriers in the bulk flow in topologicallyprotected, one-dimensional channels.