Temperature-dependent far-infrared response of epitaxial multilayer graphene

被引:5
|
作者
Lao, Yan-Feng [1 ]
Perera, A. G. Unil [1 ]
Shepperd, Kristin [2 ]
Wang, Feng [2 ]
Conrad, Edward H. [2 ]
Williams, Michael D. [3 ]
机构
[1] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA
[2] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[3] Clark Atlanta Univ, Dept Phys, Atlanta, GA 30314 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.4810757
中图分类号
O59 [应用物理学];
学科分类号
摘要
The optical response of pristine and FeCl3-intercalated epitaxial graphene has been studied over the temperature range from 11K to 296 K. The far-infrared (FIR) Drude conductivity of pristine graphene rises with increasing temperature, opposite to the behavior of intercalated graphene. This is a result of intercalation-induced p-type doping compensating the intrinsic n-doping in epitaxial graphene. Temperature-dependent Drude parameters are obtained by fitting the FIR response. This study demonstrates the influence of temperature variation on the optical properties of graphene, which should be a vital factor to be considered for graphene-based device applications. (C) 2013 AIP Publishing LLC.
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页数:3
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