论文标题
超导体 - 磁性绝缘纳米线混合系统中Majora零模式的电导光谱
Conductance Spectroscopy of Majorana Zero Modes in Superconductor-Magnetic Insulating Nanowire Hybrid Systems
论文作者
论文摘要
最近，人们对超导体 - 磁性绝缘子混合Rashba纳米线设置有可能在较小的外部Zeeman田地上托管Majora零模式。使用非平衡绿色的功能技术，我们开发了一个量子传输模型，该模型解释了超导体 - 磁性绝缘体双层结构中的准颗粒动力学与通过Rashba纳米线的传输过程之间的相互作用。我们提供了三端设置的分析，以探测清洁和无序纳米线的局部和非本地电导。我们揭示了差距的缩小和重新打开，然后出现了接近零的能量状态，这可以归因于清洁极限的拓扑零模式。在存在无序的潜力的情况下，微不足道的安德里夫结合状态可能会以象征着拓扑零模式的签名形成。我们的结果提供了基于运输的政权分析，这些制度支持这些混合系统中主要的Majorana模式的形成，同时研究障碍对设备的影响。
There has been recent interest in superconductor-magnetic insulator hybrid Rashba nanowire setups for potentially hosting Majorana zero modes at smaller external Zeeman fields. Using the non-equilibrium Green's function technique, we develop a quantum transport model that accounts for the interplay between the quasiparticle dynamics in the superconductor-magnetic insulator bilayer structure and the transport processes through the Rashba nanowire. We provide an analysis of three-terminal setups to probe the local and non-local conductance in clean and disordered nanowires. We uncover the gap closing and reopening followed by the emergence of near-zero energy states, which can be attributed to topological zero modes in the clean limit. In the presence of a disordered potential, trivial Andreev bound states may form with signatures reminiscent of topological zero modes. Our results provide transport-based analysis of regimes that support the formation of Majorana modes in these hybrid systems while investigating the effect of disorder on devices.
