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5 papers · 2 filters
The emergence of one-dimensional channels in marginal-angle twisted bilayer graphene
Niels R. Walet, Francisco Guinea
We generalize the continuum model for Moiré structures made from twisted graphene layers, in order to include lattice relaxation and the formation of channels at very small (margin…
Theory of coherent oscillations detection in THz pump-probe spectroscopy: from phonons to electronic collective modes
Mattia Udina, Tommaso Cea, Lara Benfatto
Time-resolved spectroscopies using intense THz pulses appear as a promising tool to address collective electronic excitations in condensed matter. In particular recent experiments…
Electronic band structure and pinning of Fermi energy to van Hove singularities in twisted bilayer graphene: a self consistent approach
Tommaso Cea, Niels R. Walet, Francisco Guinea
The emergence of flat bands in twisted bilayer graphene leads to an enhancement of interaction effects, and thus to insulating and superconducting phases at low temperatures, even…
Continuum models for twisted bilayer graphene: the effects of lattice deformation and hopping parameter
Francisco Guinea, Niels R. Walet
We analyze a description of twisted graphene bilayers, that incorporates deformation of the layers due to the nature modern interlayer potentials, and a modification of the hopping…
Twists and The Electronic Structure of Graphitic Materials
Tommaso Cea, Niels R. Walet, Francisco Guinea
We analyze the effect of twists on the electronic structure of configurations of infinite stacks of graphene layers. We focus on three different cases: an infinite stack where each…