BackBrowsing Artículos by Author "Silkin, Viatcheslav M."
Now showing items 1-10 of 10
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Ab initio calculation of low-energy collective charge-density excitations in MgB2
(American Physical Society, 2009-08)We present ab initio time-dependent density-functional theory calculation results for low-energy collective electron excitations in MgB2. The existence of a long-lived collective excitation corresponding to coherent charge ... -
Acoustic plasmons in extrinsic free-standing graphene
; ; ; ; Pitarke de la Torre, José María
(IOP Publishing, 2014-08-04)
An acoustic plasmon is predicted to occur, in addition to the conventional two-dimensional (2D) plasmon, as the collective motion of a system of two types of electronic carriers coexisting in the same 2D band of extrinsic ... -
Acoustic Plasmons in Nickel and Its Modification upon Hydrogen Uptake
(MDPI, 2022-12-28)In this work, we study, in the framework of the ab initio linear-response time-dependent density functional theory, the low-energy collective electronic excitations with characteristic sound-like dispersion, called acoustic ... -
Electronic Temperature and Two-Electron Processes in Overbias Plasmonic Emission from Tunnel Junctions
; ; ; ; Arnau Pino, Andrés; ; ; (American Chemical Society, 2021-08-25)
The accurate determination of electronic temperatures in metallic nanostructures is essential for many technological applications, like plasmon-enhanced catalysis or lithographic nanofabrication procedures. In this Letter, ... -
Energy loss of charged particles moving parallel to a magnesium surface
García Vergniory, Maia; Silkin, Viatcheslav M.; García de Gurtubay Galligo, Idoia; Pitarke de la Torre, José María (American Physical Society, 2008-10)
We present it ab initio calculations of the electronic energy loss of charged particles moving outside a magnesium surface, from a realistic description of the one-electron band structure and a full treatment of the dynamical ... -
Evidence for a Spin Acoustic Surface Plasmon from Inelastic Atom Scattering
(Nature, 2021-01-15)Closed-shell atoms scattered from a metal surface exchange energy and momentum with surface phonons mostly via the interposed surface valence electrons, i.e., via the creation of virtual electron-hole pairs. The latter can ... -
First-principles calculations of hot-electron lifetimes in metals
Campillo Santos, Igor; Silkin, Viatcheslav M.; Pitarke de la Torre, José María; Tchoulkov Savkin, Evgueni Vladimirovich; Rubio Secades, Angel; Echenique Landiribar, Pedro Miguel (American Physical Society, 2000)
First-principles calculations' of the inelastic lifetime of low-energy electrons in Al, Mg, Be, and Cu are reported. Quasiparticle damping rates are evaluated from the: knowledge of the electron self-energy, which we compute ... -
Modification of a Shockley-Type Surface State on Pt(111) upon Deposition of Gold Thin Layers
(MDPI, 2018-12-17)We present a first-principles fully-relativistic study of surface and interface states in the n one monolayer (ML) Au/Pt(111) heterostructures. The modification of an unoccupied s - p -type surface state existing on a ... -
Screening in Graphene: Response to External Static Electric Field and an Image-Potential Problem
(MDPI, 2021-06-13)We present a detailed first-principles investigation of the response of a free-standing graphene sheet to an external perpendicular static electric field E. The charge density distribution in the vicinity of the graphene ... -
Time-dependent electron phenomena at surfaces
(US National Academy of Sciences, 2011-01)Femtosecond and subfemtosecond time scales typically rule electron dynamics at metal surfaces. Recent advance in experimental techniques permits now remarkable precision in the description of these processes. In particular, ...