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arXiv 0806.3663cond-mat.mes-hall
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石墨烯的光学性质

Optical properties of graphene

L. A. Falkovsky

摘要:

石墨烯在光学区域的反射率和透射率作为频率,温度和载流子密度的函数进行了分析。我们表明,石墨烯的光学性质是由直接带间电子跃迁。掺杂石墨烯在低温下的动态电导率的实部取普适常数,而虚部在带间跃迁阈值处是几何发散的。

英文摘要:

Reflectance and transmittance of graphene in the optical region are analyzed as a function of frequency, temperature, and carrier density. We show that the optical graphene properties are determined by the direct interband electron transitions. The real part of the dynamic conductivity in doped graphene at low temperatures takes the universal constant value, whereas the imaginary part is logarithmically divergent at the threshold of interband transitions.

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