论文标题
二维半学的电子热场发射的通用模型
Universal model for electron thermal-field emission from two-dimensional semimetals
论文作者
论文摘要
我们介绍了从2D半学的平面外（或垂直）电子热场发射的理论。我们表明，电流 - 电压 - 温度特征受到适用于宽2D半学类的通用缩放关系，包括石墨烯及其几层Nodal Semimetal，dirac半段，在拓扑相变和Nodal Line Semimetal的边缘。这里揭示了普遍排放行为的重要结果：与普遍的期望相反，对谱带拓扑的表现在物理可观察物中的表现应不同，两个空间维度的带拓扑与彼此之间的区别不可分割，并且在电子发射特性中没有特殊的签名。我们的发现代表了2D材料中通用半经典热发射缩放定律的量子扩展，并为理解来自阴极的电子发射和电荷界面传输提供了理论基础，用于设计2D基于2D-材料的真空纳米电子产品。
We present the theory of out-of-plane (or vertical) electron thermal-field emission from 2D semimetals. We show that the current-voltage-temperature characteristic is well-captured by a universal scaling relation applicable for broad classes of 2D semimetals, including graphene and its few-layer, nodal point semimetal, Dirac semimetal at the verge of topological phase transition and nodal line semimetal. Here an important consequence of the universal emission behavior is revealed: in contrast to the common expectation that band topology shall manifest differently in the physical observables, band topologies in two spatial dimension are indistinguishable from each others and bear no special signature in the electron emission characteristics. Our findings represent the quantum extension of the universal semiclassical thermionic emission scaling law in 2D materials, and provide the theoretical foundations for the understanding of electron emission from cathode and charge interface transport for the design of 2D-material-based vacuum nanoelectronics.
