Silicon nanowire conductance in the ballistic regime / David Lacroix in Journal of heat transfer, Vol. 134 N° 5 (Mai 2012)  

Public ISBD [article]  inJournal of heat transfer > Vol. 134 N° 5 (Mai 2012) . - 08 p. Titre : Silicon nanowire conductance in the ballistic regime : models and simulations Type de document : texte imprimé Auteurs : David Lacroix, Auteur ; Karl Joulain, Auteur ; Jerome Muller, Auteur Année de publication : 2012 Article en page(s) : 08 p. Note générale : heat transfer Langues : Anglais (eng) Mots-clés : nanowire  silicon  Landauer formalism  confined phonons Index. décimale : 536 Chaleur. Thermodynamique Résumé : This study deals with phonon heat transport in silicon nanowires. A review of various methods that can be used to assess thermal conductance of such nanodevices is presented. Here, a specific attention is paid to the case of the Landauer Formalism, which can describe extremely thin wires conductance. In order to use this technique, the calculation of propagating modes in a silicon nanowire is necessary. Among the several existing models allowing such calculation, the elastic wave theory has been used to obtain the normal mode number. Besides, in this study, the transmission and reflection of phonon at the interface between two nanostructures are discussed. Using the diffuse mismatch model (DMM), the global transmissivity of the system made of a nanowire suspended between two thermal reservoirs is addressed. Then, the calculations of normal modes' numbers and thermal conductances of several silicon nanowires, with various diameters set between bulk thermal reservoirs, are presented and compared to other models and available experiments. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000005 [...] [article] Silicon nanowire conductance in the ballistic regime : models and simulations [texte imprimé] / David Lacroix, Auteur ; Karl Joulain, Auteur ; Jerome Muller, Auteur . - 2012 . - 08 p. heat transfer Langues : Anglais (eng) in Journal of heat transfer > Vol. 134 N° 5 (Mai 2012) . - 08 p. Mots-clés : nanowire  silicon  Landauer formalism  confined phonons Index. décimale : 536 Chaleur. Thermodynamique Résumé : This study deals with phonon heat transport in silicon nanowires. A review of various methods that can be used to assess thermal conductance of such nanodevices is presented. Here, a specific attention is paid to the case of the Landauer Formalism, which can describe extremely thin wires conductance. In order to use this technique, the calculation of propagating modes in a silicon nanowire is necessary. Among the several existing models allowing such calculation, the elastic wave theory has been used to obtain the normal mode number. Besides, in this study, the transmission and reflection of phonon at the interface between two nanostructures are discussed. Using the diffuse mismatch model (DMM), the global transmissivity of the system made of a nanowire suspended between two thermal reservoirs is addressed. Then, the calculations of normal modes' numbers and thermal conductances of several silicon nanowires, with various diameters set between bulk thermal reservoirs, are presented and compared to other models and available experiments. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000005 [...]

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