论文标题
通过激光场中的倾斜屏障在石墨烯中传播
Transmission in graphene through tilted barrier in laser field
论文作者
论文摘要
我们在存在频率$ω$的激光场的情况下通过倾斜的屏障电位来研究石墨烯中狄拉克费米子的传播。通过使用Floquet理论，我们求解Dirac方程，然后获得能量谱。边界条件与传输矩阵方法一起，使我们能够确定与所有能量频段$ e+l \hbarΩ$ $ $（l = 0，\ pm1，\ cdots）$相对应的传输概率。通过限制中央乐队$ l = 0 $和两个第一侧乐队$ l = \ pm 1 $，我们表明传输受到激光场和障碍的强烈影响。实际上，发现klein效应仍然存在，屏障内部有各种振荡，并且基本上没有遍布所有频段。
We study the transmission of Dirac fermions in graphene through a tilted barrier potential in the presence of a laser field of frequency $ω$. By using Floquet theory, we solve the Dirac equation and then obtain the energy spectrum. The boundary conditions together with the transfer matrix method allow us to determine the transmission probabilities corresponding to all energy bands $E+l\hbarω$ $(l=0,\pm1, \cdots)$. By limiting to the central band $l=0$ and the two first side bands $l=\pm 1$, we show that the transmissions are strongly affected by the laser field and barrier. Indeed, it is found that the Klein effect is still present, a variety of oscillations are inside the barrier, and there is essentially no transmission across all bands.
