Influence of steering effects on strain detection in AlGaInN/GaN heterostructures by ion channellin

Redondo-Cubero, Andrés; Lorenz, K.; Franco, N.; Fernández-Garrido, Sergio; Gago, R.; Smulders, P.J.M.; Muñoz Merino, Elias; Calleja Pardo, Enrique y Alves, E. (2010). Influence of steering effects on strain detection in AlGaInN/GaN heterostructures by ion channellin. En: "51st Workshop of the INFN Eloisatron Project", 25/10/2008-01/11/2008, Erice, Italia. ISBN 978-981-4307-00-0.

Descripción

Título: Influence of steering effects on strain detection in AlGaInN/GaN heterostructures by ion channellin
Autor/es:
  • Redondo-Cubero, Andrés
  • Lorenz, K.
  • Franco, N.
  • Fernández-Garrido, Sergio
  • Gago, R.
  • Smulders, P.J.M.
  • Muñoz Merino, Elias
  • Calleja Pardo, Enrique
  • Alves, E.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 51st Workshop of the INFN Eloisatron Project
Fechas del Evento: 25/10/2008-01/11/2008
Lugar del Evento: Erice, Italia
Título del Libro: Charged and Neutral Particles Channeling Phenomena: Selected Papers from the Proceedings of the 51st Workshop of the INFN Eloisatron Project
Fecha: Marzo 2010
ISBN: 978-981-4307-00-0
Materias:
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Ingeniería Electrónica
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Ion steering effects in the interface of heterostructures can strongly influence the shape and position of angular channelling scans leading to considerable error in the determination of strain by ion channelling. As an example, this paper presents channelling measurements on a near-lattice-matched AlGaInN/GaN heterostructure which show no shift between the angular scans from the quaternary layer and the underlying GaN substrate although high resolution x-ray diffraction data confirm the presence of strain in the layer. Such ‘anomalous’ behaviour was studied by means of Monte Carlo simulations for nitride ternary and quaternary films in the whole composition range. The simulations show that the thickness, magnitude of the distortion of the strained lattice and energy of the probing beam are critical parameters controlling the impact of steering. Three composition/strain regions were established for a typical beam of 2MeV alpha particles corresponding to different intensities of the steering potential and in which strain measurements by ion channelling are (a) correct, (b) possible but require corrections and (c) not possible due to steering effects.

Más información

ID de Registro: 3911
Identificador DC: http://oa.upm.es/3911/
Identificador OAI: oai:oa.upm.es:3911
URL Oficial: http://www.worldscibooks.com/physics/7743.html
Depositado por: Memoria Investigacion
Depositado el: 28 Mar 2011 10:53
Ultima Modificación: 20 Abr 2016 13:20
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