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arXiv 1206.3205cond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el
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磁光光谱中石墨烯K-声子和朗道能级内激子的共振激发

Resonant Excitation of Graphene K-Phonon and Intra-Landau-Level Excitons in Magneto-Optical Spectroscopy

M. Orlita, Liang Z. Tan, M. Potemski, M. Sprinkle, C. Berger, W. A. de Heer, Steven G. Louie, G. Martinez

摘要:

在高达32 T的磁场中对一系列多层外延石墨烯样品进行了精确的红外磁透射实验。当入射光子能量与最低朗道能级分离和K点光学声子能量共振时,我们观察到了主回旋跃迁的光谱特征和加宽的变化。我们已经开发了一个理论,解释和定量再现的频率和磁场的依赖性的现象,作为一个光子的吸收连同同时创建一个谷间,内朗道能级激子,和一个K声子。

英文摘要:

Precise infrared magnetotransmission experiments have been performed in magnetic fields up to 32 T on a series of multilayer epitaxial graphene samples. We observe changes in the spectral features and broadening of the main cyclotron transition when the incoming photon energy is in resonance with the lowest Landau level separation and the energy of a K point optical phonon. We have developed a theory that explains and quantitatively reproduces the frequency and magnetic field dependence of the phenomenon as the absorption of a photon together with the simultaneous creation of an intervalley, intra-Landau-level exciton, and a K phonon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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