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

doi:10.3938/jkps.66.1

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

^*Corresponding author for this work

Institute of Computational Intelligence

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Journal	Journal of the Korean Physical Society
Volume	66
Issue number	1
DOIs	https://doi.org/10.3938/jkps.66.1
State	Published - 1 Jan 2015

Keywords

Dirac fermions
Graphene
Thermometry
Weak localization

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title = "Thermometry for Dirac fermions in graphene",

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. ",

keywords = "Dirac fermions, Graphene, Thermometry, Weak localization",

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doi = "10.3938/jkps.66.1",

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T1 - Thermometry for Dirac fermions in graphene

AU - Liu, Fan Hung

AU - Hsu, Chang Shun

AU - Lo, Shun-Tsung

AU - Chuang, Chiashain

AU - Huang, Lung I.

AU - Woo, Tak Pong

AU - Liang, Chi Te

AU - Fukuyama, Y.

AU - Yang, Y.

AU - Elmquist, R. E.

AU - Wang, Pengjie

AU - Lin, Xi

PY - 2015/1/1

Y1 - 2015/1/1

N2 - 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.

AB - 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.

KW - Dirac fermions

KW - Graphene

KW - Thermometry

KW - Weak localization

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U2 - 10.3938/jkps.66.1

DO - 10.3938/jkps.66.1

M3 - Article

AN - SCOPUS:84921341336

VL - 66

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - 1

ER -

Thermometry for Dirac fermions in graphene

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