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

Abstract

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.

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

References in corpus (6)

• Energy Band Gap Engineering of Graphene Nanoribbons
• Energy dissipation in graphene field-effect transistors
• Thermal infrared emission reveals the Dirac point movement in biased graphene
• Electron and optical phonon temperatures in electrically biased graphene
• Imaging, simulation, and electrostatic control of power dissipation in graphene devices
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• Cold spots in quantum systems far from equilibrium: local entropies and temperatures near absolute zero
• Thermoelectric Corrections to Quantum Voltage Measurement
• Functional theories of thermoelectric phenomena
• Work Sum Rule for Open Quantum Systems
• A general method for calibration of active scanning thermal probes
• Thermodynamics of a Quantum Subsystem