论文标题
与人工增强的自旋轨耦合的弯曲石墨烯中的谐波生成
Harmonic generation in bent graphene with artificially-enhanced spin-orbit coupling
论文作者
论文摘要
我们从理论上研究了弯曲石墨烯的非线性响应，在人工增强的自旋轨道耦合的情况下，可以通过ADATOM沉积或将弯曲石墨烯片放置在与自旋轨道活性底物接触的情况下。我们讨论了弯曲耦合的自旋轨道耦合与弯曲产生的人造磁场之间的相互作用，包括Rashba和固有的自旋轨道耦合。对于后者，我们引入了一种自旋场相互作用，哈密顿量直接解决电子旋转作为一种自由度。我们的发现表明，在这种情况下，通过控制自旋轨道耦合的量，可以显着调整非线性信号的光谱，从原理上实现从THZ到UV区域的有效转化。
We theoretically investigate the nonlinear response of bent graphene, in the presence of artificially-enhanced spin-orbit coupling, which can occur either via adatom deposition, or by placing the sheet of bent graphene in contact with a spin-orbit active substrate. We discuss the interplay between the spin-orbit coupling and the artificial magnetic field generated by the bending, for both the cases of Rashba and intrinsic spin-orbit coupling. For the latter, we introduce a spin-field interaction Hamiltonian addressing directly the electron spin as a degree of freedom. Our findings reveal that in this case, by controlling the amount of spin-orbit coupling, it is possible to significantly tune the spectrum of the nonlinear signal, achieving, in principle, efficient conversion of light from THz to UV region.
