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Dirac fermions in asymmetric graphene in electromagnetic field

机译：在电磁场的不对称石墨烯的Dirac蜕散

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摘要

It is well-known that the asymmetry has dramatic effects on the properties of graphene. Therefore, here, a systematic study is presented to describe the effect of asymmetry on the Floquet oscillations in graphene. Even in the absence of external electromagnetic field, some kind of oscillations is predicted due to asymmetry. In pump-probe spectra, it is found that the amplitude of Floquet oscillations decreases in the presence of asymmetry in the graphene, however, the frequency of these oscillations increases. Moreover, the collapse and revival times are affected significantly due to asymmetry in graphene. The Bloch-Sieg-ert shift is studied in the perspective of Floquet oscillation, called Floquet-Bloch-Siegert shift. A numerical simulation is performed to justify the role of asymmetry on Floquet oscillation in graphene.
机译：众所周知，不对称对石墨烯的性质具有显着影响。因此，在这里，提出了一种系统研究以描述不对称性对石墨烯浮子振荡的影响。即使在没有外部电磁场的情况下，由于不对称性预测某种振荡。在泵探针光谱中，发现浮子振荡的幅度在石墨烯中不对称的存在下降，然而，这些振荡的频率增加。此外，由于石墨烯中不对称，塌陷和复兴时间受到显着影响。在Floquet振荡的角度下，研究了Bloch-Sieg-ert Shift，称为Floquet-Bloch-Siegert Shift。执行数值模拟以证明不对称对石墨烯浮子振荡的作用。

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