Le lezioni del corso di "Principi e Metodi NMR in Medicina" della prof.ssa Tosetti avranno inizio da giovedì 3 aprile 2008. Per contattare la docente rivolgersi ai seguenti recapiti: Michela Tosetti MR Lab. - IRCCS Stella Maris e-mail michela.tosetti@inpe.unipi.it diretto 050886215 segreteria 050886213 fax 050997004

Abstract: Metallic carbon nanotubes can carry the highest current density before they break. This makes them the best candidates as interconnects in future electronic devices. For voltages > 0.2 V, the measured IV curve of metallic tubes displays a sudden increase of the resistivity which is due to the scattering with optical phonons. Recently, we have shown [1,2] that the largest part of this electrical resisitivity is due to the presence of an anomalously-high optical-phonon occupation (hot phonons). Indeed, during transport, the conducting electrons scatter with optical phonons.