论文标题
三维拓扑绝缘子中虫洞效应的运输研究
Transport study of the wormhole effect in three-dimensional topological insulators
论文作者
论文摘要
在三维强拓扑绝缘子中，具有$ H/2E $磁通量的管带有一对受保护的一维线性费米子模式。这种现象被称为“虫洞效应”。在这项工作中，我们发现“虫洞效应”是独特的自由度，引入了异国情调的运输现象，从而操纵了拓扑绝缘子的运输特性。我们的数值结果表明，双孔系统的传输特性可以通过虫洞干扰来操纵。具体而言，由于虫洞之间的干扰，状态的电导和局部密度都随费米能振荡。此外，通过研究多孔系统，我们发现虫洞的数量还可以通过$ \ Mathbb {z} $$ _ {2} $机制来调节差分电导。最后，我们在实际应用中提出了两种类型的拓扑设备，即“虫洞开关”设备和“可穿越的虫洞”设备，可以通过控制虫洞自由度来对其进行细微调整。
Inside a three-dimensional strong topological insulator, a tube with $h/2e$ magnetic flux carries a pair of protected one-dimensional linear fermionic modes. This phenomenon is known as the "wormhole effect". In this work, we find that the "wormhole effect", as a unique degree of freedom, introduces exotic transport phenomena and thus manipulates the transport properties of topological insulators. Our numerical results demonstrate that the transport properties of a double-wormhole system can be manipulated by the wormhole interference. Specifically, the conductance and local density of states both oscillate with the Fermi energy due to the interference between the wormholes. Furthermore, by studying the multi-wormhole systems, we find that the number of wormholes can also modulate the differential conductance through a $\mathbb{Z}$$_{2}$ mechanism. Finally, we propose two types of topological devices in real applications, the "wormhole switch" device and the "traversable wormhole" device, which can be finely tuned by controlling the wormhole degree of freedom.
