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Tunnel spectroscopy of localised electronic states in hexagonal boron nitride
M. T. Greenaway, E. E. Vdovin, D. Ghazaryan +17
Hexagonal boron nitride (hBN) is a large band gap layered crystal, frequently incorporated in van der Waals (vdW) heterostructures as an insulating or tunnel barrier. Localised sta…
Excess resistivity in graphene superlattices caused by umklapp electron-electron scattering
J. R. Wallbank, R. Krishna Kumar, M. Holwill +11
Umklapp processes play a fundamental role as the only intrinsic mechanism that allows electrons to transfer momentum to the crystal lattice and, therefore, provide a finite electri…
Signatures of van Hove singularities probed by the supercurrent in a graphene - hBN superlattice
D. I. Indolese, R. Delagrange, P. Makk +4
The moiré superlattice induced in graphene by the hexagonal boron nitride substrate modifies strongly the bandstructure of graphene, which manifests itself by the appearance of new…
Transport through a network of topological states in twisted bilayer graphene
Peter Rickhaus, John Wallbank, Sergey Slizovskiy +10
We explore a network of electronic quantum valley Hall (QVH) states in the moiré crystal of minimally twisted bilayer graphene. In our transport measurements we observe Fabry-Pérot…
Ballistic electron channels including weakly protected topological states in delaminated bilayer graphene
T. L. M. Lane, M. Anđelković, J. R. Wallbank +3
We show that delaminations in bilayer graphene (BLG) with electrostatically induced interlayer asymmetry can provide one with ballistic channels for electrons with energies inside…