Please use this identifier to cite or link to this item: http://hdl.handle.net/10366/127291
Hot carrier and hot phonon coupling during ultrafast relaxation of photoexcited electrons in graphene: Profile on PlumX
Title: Hot carrier and hot phonon coupling during ultrafast relaxation of photoexcited electrons in graphene
Authors: Iglesias Pérez, José Manuel
Martín Martínez, María Jesús
Pascual Corral, Elena
Rengel Estévez, Raúl
Keywords: Graphene
Monte-Carlo, Método de
Hot phonon effect
Relaxation dynamics
Issue Date: 27-Jan-2016
Publisher: AIP Publishing LLC
Citation: Iglesias, J.M., Martín, M.J., Pascual, E. and Rengel, R. (2016). Hot carrier and hot phonon coupling during ultrafast relaxation of photoexcited electrons in graphene. Applied Physics Letterrs, 108 (4), 043105
Abstract: [EN]We study, by means of a Monte Carlo simulator, the hot phonon effect on the relaxation dynamics in photoexcited graphene and its quantitative impact as compared to considering an equilibrium phonon distribution. Our multi-particle approach indicates that neglecting the hot phonon effect significantly underestimates the relaxation times in photoexcited graphene. The hot phonon effect is more important for a higher energy of the excitation pulse and photocarrier densities between 1 and 3x10^12 cm^-2. Acoustic intervalley phonons play a non-negligible role, and emitted phonons with wavelengths limited up by a maximum (determined by the carrier concentration) induce a slower carrier cooling rate. [EN]Intrinsic phonon heating is damped in graphene on a substrate due to additional cooling pathways, with the hot phonon effect showing a strong inverse dependence with the carrier density.
URI: http://hdl.handle.net/10366/127291
ISSN: 0003-6951
Appears in Collections:DFA. Artículos del Departamento de Física Aplicada

Files in This Item:
File Description SizeFormat 
JMIglesias_HCHPCDURPG.pdf846,55 kBAdobe PDFThumbnail
View/Open


This item is is subject to a Creative Commons License