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Type: Artigo de periódico
Title: Nonlinear transport in n-III-nitrides: Selective amplification and emission of coherent LO phonons
Author: Rodrigues, CG
Vasconcellos, AR
Luzzi, R
Abstract: The nonequilibrium, macrostate of the LO phonon system in strongly-polar n-doped III-nitrides, in the presence of electric fields of intermediate to high intensities, is characterized. The emergence of a kind of resonance consisting in the selective amplification of LO vibrations in a privileged and localized off-centre region of the Brillouin zone is demonstrated. It has an associated phenomenon akin to a Cherenkov-like effect involving a preferential emission of LO phonons in a selected cone with it's axis along the direction of the electric field. Moreover, it has predicted the onset of emission (stimulated amplification) of weakly decaying coherent LO phonons generated by the drifting electrons. (c) 2006 Elsevier Ltd. All rights reserved.
Subject: semiconductors
electron-phonon interactions
electronic transport
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.ssc.2006.08.015
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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