We use polarized magneto-Raman scattering to study purely electronicexcitations and the electron-phonon coupling in bulk graphite. At a temperatureof 4.2 K and in magnetic fields up to 28 T we observe $K$-point electronicexcitations involving Landau bands with $\Delta |n|=0$ and with $\Delta|n|=\pm2$ that can be selected by controlling the angular momentum of theexcitation laser and of the scattered light. The magneto-phonon effectinvolving the $E_{2g}$ optical phonon and $K$-point inter Landau bandselectronic excitations with $\Delta |n|=\pm1$ is revealed and analyzed within amodel taking into account the full $k_z$ dispersion. These polarizationresolved results are explained in the frame of the Slonczewski-Weiss-McClure(SWM) model which directly allows to quantify the electron-hole asymmetry.
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机译：我们使用极化磁拉曼散射来研究纯石墨中的电子激发和电子-声子耦合。在温度为4.2 K且磁场高达28 T的条件下，我们观察到涉及$ _Delta | n | = 0 $和$ \ Delta | n | = \ pm2 $的Landau波段的$ K $点电子激发。通过控制激发激光和散射光的角动量。在模型中考虑了完整的$ k_z $色散，揭示并分析了涉及$ E_ {2g} $光声子和$ K $点间Landau带电子激发的磁声子效应，并带有$ \ Delta | n | = \ pm1 $。 。这些极化分辨结果在Slonczewski-Weiss-McClure（SWM）模型的框架中进行了解释，该模型直接可以量化电子-空穴的不对称性。
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