High-resolution spatial mapping of the temperature distribution of a   Joule self-heated graphene nanoribbon
  We investigate the temperature distributions of Joule self-heated graphene nanoribbons (GNRs) with a spatial resolution finer than 100 nm by scanning thermal microscopy (SThM). The SThM probe is calibrated using the Raman G mode Stokes/anti-Stokes intensity ratio as a function of electric power applied to the GNR devices. From a spatial map of the temperature distribution, heat dissipation and transport pathways are investigated. By combining SThM and scanning gate microscopy data from a defected GNR, we observe hot spot formation at well-defined, localized sites. 
Young-Jun Yu, Melinda Y. Han, Stephane Berciaud, Alexandru B.   Georgescu, Tony F. Heinz, Louis E. Brus, Kwang S. Kim, Phili...
cond-mat.mes-hall