313 citations · 2k across the 83 of their papers we have counts for
12 papers · 1 filter
Topological phases of a generalised tripartite Haldane model
Ahmed Al-kharusi, Alessandro Principi, Niels R. Walet
We present a generalised tripartite Haldane model with a complex nearest neighbour hopping parameter. The total magnetic flux through the primitive unit cell, which consists of thr…
Giant atomic swirl in graphene bilayers with biaxial heterostrain
F. Mesple, N. R. Walet, G. Trambly de Laissardière +7
The study of moiré engineering started with the advent of van der Waals heterostructures in which stacking two-dimensional layers with different lattice constants leads to a moiré…
Electrostatic interactions in twisted bilayer graphene
Tommaso Cea, Pierre A. Pantaleón, Niels R. Walet +1
The effects of the long range electrostatic interaction in twisted bilayer graphene are described using the Hartree-Fock approximation. The results show a significant dependence of…
Flat bands, strains, and charge distribution in twisted-bilayer hBN
Niels R. Walet, Francisco Guinea
We study the effect of twisting on bilayer graphene. The effect of lattice relaxation is included; we look at the electronic structure, piezo-electric charges and spontaneous polar…
Charge-polarized interfacial superlattices in marginally twisted hexagonal boron nitride
C. R. Woods, P. Ares, H. Nevison-Andrews +7
When two-dimensional crystals are brought into close proximity, their interaction results in strong reconstruction of electronic spectrum and local crystal structure. Such reconstr…
Tuneable terahertz oscillation arising from Bloch-point dynamics in chiral magnets
Yu Li, Leonardo Pierobon, Michalis Charilaou +5
Skyrmionic textures are being extensively investigated due to the occurrence of novel topological magnetic phenomena and their promising applications in a new generation of spintro…
Electrostatic effects, band distortions and superconductivity in twisted graphene bilayers
Francisco Guinea, Niels R. Walet
Bilayer graphene twisted by a small angle shows a significant charge modulation away from neutrality, as the charge in the narrow bands near the Dirac point is mostly localized in…
Effective Interactions in a Graphene Layer Induced by the Proximity to a Ferromagnet
Vo Tien Phong, Niels R. Walet, Francisco Guinea
The proximity-induced couplings in graphene due to the vicinity of a ferromagnetic insulator are analyzed. We combine general symmetry principles and simple tight-binding descripti…
Edge modes and non local conductance in graphene superlattices
Rory Brown, Niels R. Walet, Francisco Guinea
We study the existence of edge modes in gapped Moiré superlattices in graphene monolayer ribbons. We find that the superlattice bands acquire finite Chern numbers, which lead to a…
Water confined between graphene layers: the case for a square ice
Niels R. Walet
Water confined between two graphene layers with a small separation forms a two-dimensional ice structure,with an apparent square symmetry [Algara-Siller et al., Nature (London) 519…
Interaction between point charges, dipoles and graphene layers
Francisco Guinea, Niels R. Walet
We analyse the interaction between charges and graphene layers. The electric polarisability of graphene induces a force, that can be described by an image charge. The analysis show…
Full 2D Numerical Study of the Quantum Hall Skyrme Crystal
Niels R. Walet, Tom Weidig
Spin textures arise in the effective action approach to the quantum Hall effect. Up to now these textures, also called Skyrmions, have been mainly studied using approximations. Stu…