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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the Korean Physical Society 2015, 66(1), , pp.1-6
Main Authors: 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: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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