48 citations · 154 across the 13 of their papers we have counts for
13 papers
Graphene Nano-Ribbons: Major differences in the fundamental gap as its length is increased either in the zig-zag or the armchair directions
J. A. Vergés, G. Chiappe, E. Louis
Controlling the forbidden gap of graphene nano-ribbons (GNR) is a major challenge that has to be attained if this attractive material has to be used in micro- and nano-electronics.…
The role of potassium orbitals in the metallic behavior of K3picene
G. Chiappe, E. Louis, A. Guijarro +2
Detailed electronic structure calculations of picene clusters doped by potassium modeling the crystalline K3picene structure show that while two electrons are completely transferre…
Transport regimes in surface disordered graphene sheets
E. Louis, J. A. Verges, F. Guinea +1
We investigate the size scaling of the conductance of surface disordered graphene sheets of width W and length L. Metallic leads are attached to the sample ends across its width. A…
Energy radiation of moving cracks
S. Fratini, O. Pla, P. Gonzalez +2
The energy radiated by moving cracks in a discrete background is analyzed. The energy flow through a given surface is expressed in terms of a generalized Poynting vector. The veloc…
Effects of Fermi energy, dot size and leads width on weak localization in chaotic quantum dots
E. Louis, J. A. Verges
Magnetotransport in chaotic quantum dots at low magnetic fields is investigated by means of a tight binding Hamiltonian on L x L clusters of the square lattice. Chaoticity is induc…
Dynamics of Holes and Universality Class of the Antiferromagnetic Transition in the Two Dimensional Hubbard Model
F. Guinea, E. Louis, P. Lopez-Sancho +1
The dynamics of a single hole (or electron) in the two dimensional Hubbard model is investigated. The antiferromagnetic background is described by a Nèel state, and the hopping of…
Straight cracks in dynamic brittle fracture
O. Pla, F. Guinea, E. Louis +2
We study the dynamics of cracks in brittle materials when the velocity of the crack is comparable to the sound velocity by means of lattice simulations. Inertial and damped dynamic…
A Configuration Interaction approach to hole pairing in the Two-Dimensional Hubbard Model
E. Louis, F. Guinea, M. P. Lopez-Sancho +1
The interactions between holes in the Hubbard model, in the low density, intermediate to strong coupling limit, are investigated by systematically improving mean field calculations…
Hole Pairs in the Two-Dimensional Hubbard Model
E. Louis, F. Guinea, M. P. Lopez Sancho +1
The interactions between holes in the Hubbard model, in the low density, intermediate to strong coupling limit, are investigated. Dressed spin polarons in neighboring sites have an…
A new model of quantum chaotic billiards: Spectral Statistics and Wavefunctions in 2D
E. Cuevas, E. Louis, J. A. Verges
Quantum chaotic dynamics is obtained for a tight-binding model in which the energies of the atomic levels at the boundary sites are chosen at random. Results for the square lattice…
Dimensional effects in photoelectron spectra of Ag deposits on GaAs(110) surfaces
V. Gasparian, E. Louis, J. A. Vergés
It is shown that the peak structure observed in angle-resolved photoelectron spectra of metallic deposits can only be unambiguously associated to single electronic states if the de…
Momentum dependence of the spin and charge excitations in the two dimensional Hubbard model
M. P. López-Sancho, F. Guinea, J. A. Vergés +1
The low energy spin and charge excitations in the 2D Hubbard model near half filling are analyzed. The RPA spectra derived from inhomoheneous mean field textures are analyzed. Spin…
Complexity and criticality in Laplacian growth models
F. Guinea, O. Pla, E. Louis
We analyze the dynamical evolution of systems which obey simple growth laws, like diffusion limited aggregation or dielectric breakdown. We show that, if the developing patterns is…