存在圆形 n-p 结时拓扑表面态的量子输运

IF 2.6 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physica Scripta Pub Date : 2024-09-17 DOI:10.1088/1402-4896/ad78c7

Neetu Agrawal

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引用次数: 0

摘要

拓扑绝缘体表面态的特点是自旋-动量锁定，即电子自旋与其动量垂直锁定。这一特性在栅极电势下得以保留，可用于在没有外部磁场的情况下操纵自旋电流，从而增强了自旋电子应用的前景。在这里，我们研究了位于五层三维拓扑绝缘体上表面的圆形 n-p 结内拓扑表面态波函数的散射。通过分析计算，我们解释了这些表面态在此类系统中的散射。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Quantum transport of topological surface states in presence of circular n-p junctions

The surface states of topological insulators are characterized by spin-momentum locking, where the electron spin is locked perpendicular to its momentum. This property is preserved under gate potentials which can be used to manipulate spin currents without an external magnetic field enhancing the prospects for spintronic applications. Here, we investigate the scattering of the wave functions of topological surface states within the circular n-p junction positioned on the upper surface of the quintuple-layered three-dimensional topological insulator. With the analytical calculations we explain the scattering of these surface states in such systems.

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来源期刊

Physica Scripta 物理-物理：综合

CiteScore

3.70

自引率

3.40%

发文量

782

审稿时长

4.5 months

期刊介绍： Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed: -Atomic, molecular and optical physics- Plasma physics- Condensed matter physics- Mathematical physics- Astrophysics- High energy physics- Nuclear physics- Nonlinear physics. The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.