Oblique Klein tunneling in 8-Pmmn borophene p-n junctions
Oblique Klein tunneling in 8-Pmmn borophene p-n junctions
复制标题
8-Pmmn 硼吩 p-n 结中的斜克莱因隧道效应
DOI：
10.1103/physrevb.97.235440
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发表时间：
2018
影响因子：
3.7
通讯作者：
Wen Yang
中科院分区：
文献类型：
--
作者：
Shu-Hui Zhang;Wen Yang
8-Pmmn硼化物是一种新的单分子膜，具有各向异性和倾斜的无质量狄拉克费米子。基于单层材料的平面p-n结（PNJ）结构作为各种新型器件的基本组成部分，越来越受到人们的关注。在这里，我们分析研究的各向异性和倾斜的跨8-Pmmn硼铌酸盐PNJ。transport.properties类似于石墨烯结上的各向同性透射，存在完美的透射，但其方向偏离由各向异性和倾斜引起的硼化物PNJ的法线方向，即，斜克莱因隧穿斜Klein隧穿不依赖于PNJ的N和P区域中的掺杂水平作为正常的Klein隧穿，但取决于结。此外，我们还解析地导出了理想传输方向与PNJ法线方向之差最大时的特殊结方向，并清楚地区分了斜Klein隧穿中各向异性和倾斜的贡献。随着实验技术的迅速发展，我们期望在不久的将来可以观察到斜克莱因隧穿。
The 8-Pmmn borophene is one kind of new elemental monolayer, which hosts anisotropic and tilted massless.Dirac fermions (MDF). The planar p-n junction (PNJ) structure as the basic component of various novel devices.based on the monolayer material has attracted increasing attention. Here, we analytically study the transport.properties of anisotropic and tilted MDF across 8-Pmmn borophene PNJ. Similar to the isotropic MDF across.graphene junctions, perfect transmission exists but its direction departures the normal direction of borophene PNJ.induced by the anisotropy and tilt, i.e., oblique Klein tunneling. The oblique Klein tunneling does not depend.on the doping levels in N and P regions of PNJ as the normal Klein tunneling but depends on the junction.direction. Furthermore, we analytically derive the special junction direction for the maximal difference between.perfect transmission direction and the normal direction of PNJ and clearly distinguish the respective contribution.of anisotropy and tilt underlying the oblique Klein tunneling. In light of the rapid advances of experimental.technologies, we expect the oblique Klein tunneling to be observable in the near future.