论文标题
通过潜在屏障在硅烯中费米子的隧道效应
Tunneling effect of fermions in silicene through potential barrier
论文作者
论文摘要
探索了矩形电势屏障对硅质量量子转运的影响。具体而言，提出了分析解决方案，以得出传播和反射概率以及电导。结果表明，传输对屏障高度和入射能量都高度敏感。结果，观察到klein和谐振隧道的发生，对屏障宽度有很大的依赖。值得注意的是，发现完美的传播范围超出了正常发射率，并以各种倾斜角度出现。此外，传输模式表现出更加碎片的结构，并增加了屏障宽度，让人联想到Fabry-Pérot共振。相比之下，电导显示出对入射能的非单调依赖性，并具有势垒高度上升的快速振荡。但是，在恒定的屏障高度下，对于高入射能值的电导曲线之间的差异很小。当入射能等于屏障高度时，电导率会达到局部最低限度。对于较薄的屏障，观察到电导率大大降低，与较厚的屏障所看到的振荡行为不同。这些发现强调了硅烯研究的进展，并为隧道在该材料中的相对论应用提供了新的观点。
The influence of a rectangular potential barrier on the quantum transport of fermions in silicene is explored. Specifically, analytical solutions are presented to derive transmission and reflection probabilities together with conductance. It is shown that the transmission is highly sensitive to both the barrier height and incident energy. As a result, the occurrence of Klein and resonant tunnelings is observed, with a significant dependence on the barrier width. Notably, it is found that perfect transmission extends beyond normal incidence, occurring at various oblique angles. Moreover, the transmission pattern exhibits a more fragmented structure with increasing barrier width, reminiscent of Fabry-Pérot resonances. In contrast, the conductance displays a non-monotonic dependence on incident energy and features rapid oscillations with a rising barrier height. However, at a constant barrier height, there is a minimal disparity among conductance profiles for high incident energy values. When incident energy equals the barrier height, the conductance experiences a local minimum. For a thin barrier, a substantial reduction in conductance is observed, unlike the oscillatory behavior seen with a thicker barrier. These findings underscore the progress in silicene research and offer a fresh perspective on the relativistic applications of tunneling in this material.
