Abstract
We use both the zero-magnetic-field resistivity and the phase coherence time determined by weak localization as independent thermometers for Dirac fermions (DF) in multilayer graphene. In the high current (I) region, there exists a simple power law T DF ∝ I ~0.5, where T DF is the effective Dirac fermion temperature for epitaxial graphene on SiC. In contrast, T DF ∝ I ~1 in exfoliated multilayer graphene. We discuss possible reasons for the different power laws observed in these multilayer graphene systems. Our experimental results on DF-phonon scattering may find applications in graphene-based nanoelectronics.
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Liu, FH., Hsu, CS., Lo, ST. et al. Thermometry for Dirac fermions in graphene. Journal of the Korean Physical Society 66, 1–6 (2015). https://doi.org/10.3938/jkps.66.1
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DOI: https://doi.org/10.3938/jkps.66.1