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Ultrapure multilayer graphene in bromine-intercalated graphite

机译：溴嵌入石墨中的超纯多层石墨烯

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摘要

We investigate the optical properties of bromine-intercalated highly orientated pyrolytic graphite (Br-HOPG) and provide an interpretation of the data. We observe absorption features below 620 meV which are absent in the absorption spectrum of graphite. Comparing our results with those of theoretical studies on graphite, single- and bilayer graphene, as well as recent optical studies of multilayer graphene, we conclude that Br-HOPG contains the signatures of ultrapure bilayer graphene, ultrapure single-layer graphene, and graphite. The observed super-metallic conductivity of Br-HOPG is identified with the presence of very high mobility (≈121 000 cm~2V~(-1)s~(-1) at room temperature and at very high carrier density), multilayer graphene components in our sample. This could provide an avenue for single- and multilayer graphene research.
机译：我们研究了溴嵌入的高取向热解石墨（Br-HOPG）的光学性质，并提供了数据的解释。我们观察到低于620 meV的吸收特征在石墨的吸收光谱中是不存在的。将我们的结果与对石墨，单层和双层石墨烯的理论研究以及多层石墨烯的最新光学研究进行比较，我们得出的结论是，Br-HOPG包含超纯双层石墨烯，超纯单层石墨烯和石墨的特征。多层石墨烯具有很高的迁移率（在室温和非常高的载流子密度下约为12.1万厘米〜2V〜（-1）s〜（-1）），可以识别出Br-HOPG的超金属电导率。样本中的组件。这可以为单层和多层石墨烯研究提供一条途径。

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  • 来源
    《Physical review》 |2011年第4期|p.041410.1-041410.4|共4页
  • 作者

    J. Hwang; J. P. Carbotte; S. Tongay; A. F. Hebard; D. B. Tanner;

  • 作者单位

    Department of Physics, Pusan National University, Busan 609-735, Republic of Korea,Department of Physics, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea;

    Department of Physics and Astronomy, McMaster University, Hamilton, ON, Canada L8S 4M1;

    Department of Physics, University of Florida, Gainesville, FL 32611, USA;

    Department of Physics, University of Florida, Gainesville, FL 32611, USA;

    Department of Physics, University of Florida, Gainesville, FL 32611, USA;

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