123 citations · 371 across the 15 of their papers we have counts for
16 papers
Phase-Space Ab-Initio Direct and Reverse Ballistic-Electron Emission Spectroscopy: Schottky Barriers Determination for Au/Ge(100)
Andrea Gerbi, Renato Buzio, Cesar Gonzalez +2
We develop a phase-space ab-initio formalism to compute Ballistic Electron Emission Spectroscopy current-voltage I(V)'s in a metal-semiconductor interface. We consider injection of…
Monitoring and Forecasting COVID-19: Statistical Heuristic Regression, Susceptible-Infected-Removed model and, Spatial Stochastics
Pedro L. de Andres, Lucia de Andres-Bragado, Linard D. Hoessly
The COVID-19 pandemic has had worldwide devastating effects on human lives, highlighting the need for tools to predict its development. Dynamics of such public-health threats can o…
Formation of Hydrocarbons from Hydrogenated Graphene in Circumstellar Clouds
Jose I. Martinez, Jose A. Martin-Gago, Jose Cernicharo +1
We describe a mechanism that explains the formation of hydrocarbons and hydrocarbyls from hydrogenated graphene/graphite; hard C-C bonds are weakened and broken by the synergistic…
One-dimensional potential for image-potential states on graphene
P. L. de Andres, P. M. Echenique, D. Niesner +2
In the framework of dielectric theory the static non-local self-energy of an electron near an ultra-thin polarizable layer has been calculated and applied to study binding energies…
Bending modes, anharmonic effects and thermal expansion coefficient in single layer and multilayer graphene
P. L. de Andres, F. Guinea, M. I. Katsnelson
We present a simple analytical approach to study anharmonic effects in single layer, bilayer, and multilayer graphene. The coupling between in plane and out of plane modes leads to…
Ab initio electronic and geometrical structures of tripotassium-intercalated phenanthrene
P. L. de Andres, A. Guijarro, J. A. Verges
The geometrical and electronic structure of tripotassium doped phenanthrene, \ce{K3C14H10}, have been studied by first-principles density functional theory. The main effect of pota…
Crystal structure and electronic states of tripotassium picene
P. L. de Andres, A. Guijarro, J. A. Verges
The crystal structure of potassium doped picene with an exact stoichiometry (K3C22H14, K3picene from here onwards) has been theoretically determined within Density Functional Theor…
Trapping of electrons near chemisorbed hydrogen on graphene
J. A. Verges, P. L. de Andres
Chemical adsorption of atomic hydrogen on a negatively charged single layer graphene sheet has been analyzed with ab-initio Density Functional Theory calculations. We have simulate…
Ab-initio calculation of the effect of stress on the chemical activity of graphene
P. L. de andres, J. A. Verges
Graphene layers are stable, hard, and relatively inert. We study how tensile stress affects and bonds and the resulting change in the chemical activity. Stress affects more…
Ballistic Electron Emission Microscopy on CoSi/Si(111) interfaces: band structure induced atomic-scale resolution and role of localized surface states
K. Reuter, F. J. Garcia-Vidal, P. L. de Andres +2
Applying a Keldysh Green`s function method it is shown that hot electrons injected from a STM-tip into a CoSi/Si(111) system form a highly focused beam due to the silicide ba…
Manifestation of quantum chaos on ordered structures by scattering techniques: application to Low-Energy Electron Diffraction
P. L. de Andres, J. A. Verges
We analyze statistical probability distributions of intensities collected by diffraction techniques like Low-Energy Electron Diffraction. A simple theoretical model based in hard-s…
Quantum mechanical analysis of the elastic propagation of electrons in the Au/Si system: application to Ballistic Electron Emission Microscopy
K. Reuter, P. L. de Andres, F. J. Garcia-Vidal +3
We present a Green's function approach based on a LCAO scheme to compute the elastic propagation of electrons injected from a STM tip into a metallic film. The obtained 2D current…
Hot electron transport in Ballistic Electron Emission Spectroscopy: band structure effects and k-space currents
K. Reuter, P. L. de Andres, F. J. Garcia-Vidal +3
Using a Green's function approach, we investigate band structure effects in the BEEM current distribution in reciprocal space. In the elastic limit, this formalism provides a 'para…
A Transport Analysis of the BEEM Spectroscopy of Au/Si Schottky Barriers
U. Hohenester, P. Kocevar, P. L. de Andres +1
A systematic transport study of the ballistic electron emission microscopy (BEEM) of Au/Si(100) and Au/Si(111) Schottky barriers for different thicknesses of the metal layer and di…
A theoretical analysis of Ballistic Electron Emission Microscopy: k-space distributions and spectroscopy
P. L. de Andres, K. Reuter, F. J. Garcia-Vidal +2
We analyze BEEM experiments. At low temperatures and low voltages, near the threshold value of the Schottky barrier, the BEEM current is dominated by the elastic component. Elastic…
Manifestation of quantum chaos on scattering techniques: application to low-energy and photo-electron diffraction intensities
P. L. de Andres, J. A. Vergés
Intensities of LEED and PED are analyzed from a statistical point of view. The probability distribution is compared with a Porter-Thomas law, characteristic of a chaotic quantum sy…