Thermometry for Dirac fermions in graphene

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 f...

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Veröffentlicht in:	Journal of the Korean Physical Society 2015, 66(1), , pp.1-6
Hauptverfasser:	Liu, Fan-Hung, Hsu, Chang-Shun, Lo, Shun-Tsung, Chuang, Chiashain, Huang, Lung-I, Woo, Tak-Pong, Liang, Chi-Te, Fukuyama, Y., Yang, Y., Elmquist, R. E., Wang, Pengjie, Lin, Xi
Format:	Artikel
Sprache:	eng
Schlagworte:	Mathematical and Computational Physics Particle and Nuclear Physics Physics Physics and Astronomy Theoretical 물리학
Online-Zugang:	Volltext
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Zusammenfassung:	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.
ISSN:	0374-4884 1976-8524
DOI:	10.3938/jkps.66.1