Thermometry for Dirac fermions in graphene

被引：1
|
作者：
Liu, Fan-Hung [1 ]
Hsu, Chang-Shun [1 ]
Lo, Shun-Tsung [1 ]
Chuang, Chiashain [2 ]
Huang, Lung-, I [2 ]
Woo, Tak-Pong [2 ]
Liang, Chi-Te [2 ]
Fukuyama, Y. [3 ]
Yang, Y. [4 ]
Elmquist, R. E. [4 ]
Wang, Pengjie [5 ]
Lin, Xi [5 ]
机构：
[1] Natl Taiwan Univ, Grad Inst Appl Phys, Taipei 106, Taiwan
[2] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan
[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki, Japan
[4] NIST, Gaithersburg, MD 20899 USA
[5] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2015年 / 66卷 / 01期
关键词：
Graphene; Dirac fermions; Weak localization; Thermometry; 2-DIMENSIONAL ELECTRON-GAS; MAGNETIC-FIELD; QUANTUM; TRANSPORT; INSULATOR; CONDUCTIVITY; OSCILLATIONS; SCATTERING; PHASE; RATES;
D O I：
10.3938/jkps.66.1
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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) ae I (similar to 0.5), where T (DF) is the effective Dirac fermion temperature for epitaxial graphene on SiC. In contrast, T (DF) ae I (similar to 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.
引用
收藏
页码：1 / 6
页数：6
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