Thermometry for Dirac fermions in graphene

Fan Hung Liu, Chang Shun Hsu, Shun Tsung Lo, Chiashain Chuang, Lung I. Huang, Tak Pong Woo, Chi Te Liang, Y. Fukuyama, Y. Yang, R. E. Elmquist, Pengjie Wang, Xi Lin

Research output: Contribution to journalArticlepeer-review


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 TDF ∝ I~0.5, where TDF is the effective Dirac fermion temperature for epitaxial graphene on SiC. In contrast, TDF ∝ 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.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalJournal of the Korean Physical Society
Issue number1
StatePublished - 2015
Externally publishedYes


  • Dirac fermions
  • Graphene
  • Thermometry
  • Weak localization

ASJC Scopus subject areas

  • General Physics and Astronomy


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