Titlebook: Electronic Properties of Graphene Heterostructures with Hexagonal Crystals; John R. Wallbank Book 2014 Springer International Publishing S

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Michael Gubanov,Linda Shapiro,Anna Pyaytallel magnetic field, which provides an additional momentum transfer to the tunnelling electrons. In contrast, for a strong perpendicular magnetic field, the current-voltage characteristics are instead controlled by resonances between the Landau levels on the two layers.

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Introduction,lectronic properties. This includes the tight binding and k.p models, group theory, calculation of Landau levels and the geometry of the moiré pattern. This last section is valid for the heterostructures of almost commensurate crystals with any lattice type, and shows that defects in either crystal

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Monolayer Graphene on a hBN Underlay,xagonal boron nitride). In particular, we identify conditions at which the first moiré miniband is separated from the rest of the spectrum by either one or a group of three isolated secondary Dirac points, and is not obscured by dispersion surfaces coming from other minibands. In such cases, the Hal

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Optical Absorption in Graphene-hBN Heterostructures,l for the graphene electrons modifies the selection rules for absorption of incoming photons in the infrared to visible frequency range. The details of the absorption spectrum modification depend on the relative strength of the various symmetry-allowed couplings between the graphene electrons and th

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Fractal Spectrum of Magnetic Minibands in Graphene-hBN Heterostructures,lids. The electronic band structure is fractured into multiple magnetic bands, for each magnetic field providing a rational fraction of magnetic flux quanta, ., per unit cell. Since the sparsity of the spectrum increases for larger values of the denominator ., the observation of fractal magnetic ban

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Resonant Tunnelling in Graphene-Insulator-Graphene Heterostructures,er. In the absence of a magnetic field, the current-voltage characteristics are controlled by the phase space available for tunnelling. This is severely restricted by the requirements of energy and momentum conservation, and leads to negative differential conductances. This remains the case in a par