1.3k citations · 2.4k across the 19 of their papers we have counts for
19 papers
High-order minibands and interband Landau level reconstruction in graphene moire superlattice
Xiaobo Lu, Jian Tang, John R. Wallbank +13
The propagation of Dirac fermions in graphene through a long-period periodic potential would result in a band folding together with the emergence of a series of cloned Dirac points…
Imputation of missing sub-hourly precipitation data in a large sensor network: a machine learning approach
Benedict Delahaye Chivers, John Wallbank, Steven J. Cole +4
Precipitation data collected at sub-hourly resolution represents specific challenges for missing data recovery by being largely stochastic in nature and highly unbalanced in the du…
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…
Gate induced monolayer behavior in twisted bilayer black phosphorus
Cem Sevik, John R. Wallbank, Oguz Gulseren +2
Optical and electronic properties of black phosphorus strongly depend on the number of layers and type of stacking. Using first-principles calculations within the framework of dens…
Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures
J. R. Wallbank, D. Ghazaryan, A. Misra +15
Chirality is a fundamental property of electrons with the relativistic spectrum found in graphene and topological insulators. It plays a crucial role in relativistic phenomena, suc…
Ballistic miniband conduction in a graphene superlattice
Menyoung Lee, John R. Wallbank, Patrick Gallagher +4
Rational design of artificial lattices yields effects unavailable in simple solids, and vertical superlattices of multilayer semiconductors are already used in optical sensors and…
Twist-controlled Resonant Tunnelling between Monolayer and Bilayer Graphene
Thomas L M Lane, John R Wallbank, Vladimir I Fal'ko
We investigate the current-voltage characteristics of a field-effect tunnelling transistor comprised of both monolayer and bilayer graphene with well-aligned crystallographic axes,…
Moire miniband features in the angle-resolved photoemission spectra of graphene/hBN heterostructures
M. Mucha-Kruczynski, J. R. Wallbank, V. I. Fal'ko
We identify features in the angle-resolved photoemission spectra (ARPES) arising from the periodic pattern characteristic for graphene heterostructure with hexagonal boron nitride…
Resonant tunnelling between the chiral Landau states of twisted graphene lattices
M. T. Greenaway, E. E. Vdovin, A. Mishchenko +12
A new class of multilayered functional materials has recently emerged in which the component atomic layers are held together by weak van der Waals forces that preserve the structur…
Moire pattern as a magnifying glass for strain and dislocations in van der Waals heterostructures
Diana A. Cosma, John R. Wallbank, Vadim Cheianov +1
We consider the role of deformations in graphene heterostructures with hexagonal crystals (including strain, wrinkles and dislocations) on the geometrical properties of moire patte…
Dirac edges of fractal magnetic minibands in graphene with hexagonal moire superlattices
Xi Chen, J. R. Wallbank, A. A. Patel +3
We find a systematic reappearance of massive Dirac features at the edges of consecutive minibands formed at magnetic fields B_{p/q}= pϕ_0/(qS) providing rational magnetic flux thro…
Infrared absorption by graphene-hBN heterostructures
D. S. L. Abergel, J. R. Wallbank, Xi Chen +2
We propose a theory of optical absorption in monolayer graphene-hexagonal boron nitride (hBN) heterostructures. In highly oriented heterostructures, the hBN underlay produces a lon…
Moiré minibands in graphene heterostructures with almost commensurate sqrt3 x sqrt3 hexagonal crystals
J. R. Wallbank, M. Mucha-Kruczynski, V. I. Fal'ko
We present a phenomenological theory of the low energy moiré minibands of Dirac electrons in graphene placed on an almost commensurate hexagonal underlay with a unit cell pproximat…
Heterostructure bilayer graphene-hBN: Interplay between misalignment, interlayer asymmetry, and trigonal warping
M. Mucha-Kruczynski, J. Wallbank, V. I. Fal'ko
We study the superlattice minibands produced by the interplay between moiré pattern induced by hexagonal BN substrate on graphene layer and the interlayer coupling in bilayer graph…
Cloning of Dirac fermions in graphene superlattices
L. A. Ponomarenko, R. V. Gorbachev, G. L. Yu +15
Lateral superlattices have attracted major interest as this may allow one to modify spectra of two dimensional electron systems and, ultimately, create materials with tailored elec…