High-resolution spatial mapping of the temperature distribution of a Joule self-heated graphene nanoribbon

Details High-resolution spatial mapping of the temperature distribution of a Joule self-heated graphene nanoribbon High-resolution spatial mapping of the temperature distribution of a Joule self-heated graphene nanoribbon

2011-10-13

arxiv.org/abs/1110.2984v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, accepted on App. Phys. Lett

Scientific paper

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.

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