论文标题
石墨烯中的fermions通过倾斜潜在屏障的延迟时间延迟时间
Group delay time of fermions in graphene through tilted potential barrier
论文作者
论文摘要
在石墨烯中研究了沿$ x $轴沿着$ x $轴倾斜的障碍物潜力的集体延迟时间。首先，我们找到狄拉克方程的特征素解，然后将其与入射，反射和透射的束波相关。这种关系使我们能够通过获得相应的相移来计算传输和反射的群体延迟时间。我们发现，可以使用屏障宽度，入射能和入射角来修改组延迟时间，并且颗粒以费米速度$ v_f $的屏障穿过屏障。我们的发现还表明，可以控制传输组延迟，并且该栅极控制可能在基于石墨烯的倾斜屏障中很有用。
The group delay time of Dirac fermions subjected to a tilting barrier potential along the $ x $-axis is investigated in graphene. We start by finding the eigenspinor solution of the Dirac equation and then relating it to incident, reflected, and transmitted beam waves. This relationship allows us to compute the group delay time in transmission and reflection by obtaining the corresponding phase shifts. We discovered that the barrier width, incident energy, and incident angle can all be used to modify the group delay time, and that the particles travel through the barrier at the Fermi velocity $ v_F $. Our findings also show that the transmission group delay might be controlled, and that gate voltage control could be useful in graphene-based tilting barriers.
