arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.09338cond-mat.supr-con
收藏

二维$p+id$拓扑超导体中$p$波对Majorana模的控制

Controlling Majorana modes by $p$-wave pairing in two-dimensional $p+id$ topological superconductors

Morten Amundsen, Vladimir Juričić

摘要:

我们表明,在二维$p+id$拓扑超导体的角落马约拉纳零模式可以控制的父$p-$波超导秩序的操纵。假设$p$波超导序是手征相或螺旋相,我们发现当引入$d_{x^2-y^2}$波超导序时,系统表现出完全不同的行为,这取决于母体$p$波相的性质.特别是,我们发现,而在螺旋相,本地化的马约拉纳模式出现在四个角落,在手征相,它是本地化的四个边缘中的两个。我们还证明,马约拉纳可以直接控制的边缘的形式,因为我们明确显示的情况下的圆形边缘。我们认为,应变的应用程序可以提供额外的微调系统中的马约拉纳零模式的手段,特别是,它可以部分间隙出来。我们的研究结果可能是相关的探测二维混合配对超导体的拓扑结构。

英文摘要:

We show that corner Majorana zero modes in a two-dimensional $p+id$ topological superconductor can be controlled by the manipulation of the parent $p-$wave superconducting order. Assuming that the $p$-wave superconducting order is in either a chiral or helical phase, we find that when a $d_{x^2-y^2}$ wave superconducting order is induced, the system exhibits quite different behavior depending on the nature of the parent $p$-wave phase. In particular, we find that while in the helical phase, a localized Majorana mode appears at each of the four corners, in the chiral phase, it is localized only along two of the four edges. We furthermore demonstrate that the Majoranas can be directly controlled by the form of the edges, as we explicitly show in case of the circular edges. We argue that the application of strain may provide additional means of fine-tuning the Majorana zero modes in the system, in particular, it can partially gap them out. Our findings may be relevant for probing the topology in two-dimensional mixed-pairing superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑