Doable resonant Raman scattering in graphite
Doable resonant Raman scattering in graphite
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DOI：
10.1103/physrevlett.85.5214
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发表时间：
2000-12-11
影响因子：
8.6
通讯作者：
Reich, S
中科院分区：
文献类型：
--
作者：
Thomsen, C;Reich, S
我们发现石墨中的电子色散会产生双共振拉曼散射，激发能量高达 5 eV。正如我们所展示的，石墨 D 模式奇怪的激发能量依赖性是由于这种双共振过程解决了文献中长期存在的问题，并使最近解释这一现象的尝试无效。我们对 D 模频移 (60 cm(-1)/eV) 的计算与实验值非常吻合。
We find that the electronic dispersion in graphite gives rise to double resonant Raman scattering for excitation energies up to 5 eV. As we show, the curious excitation-energy dependence of the graphite D mode is due to this double resonant process resolving a long-standing problem in the literature and invalidating recent attempts to explain this phenomenon. Our calculation for the D-mode frequency shift (60 cm(-1)/eV) agrees well with the experimental value.