论文标题
理论提议从具有耗散环境的涡流扫描隧道光谱中获得强大的主要证据
Theoretical proposal to obtain strong Majorana evidence from scanning tunneling spectroscopy of a vortex with a dissipative environment
论文作者
论文摘要
可以预测，拓扑超导体中的涡流包含Majorana零模式（MZM）。确认的Majorana签名，即$ 2E^2/h $量化的电导，但是不可避免的中断很容易破坏，例如仪器拓宽，非莫霍拉纳信号和额外的粒子通道。我们建议通过引入无序诱导的耗散，以避免信号中断。涉及耗散，我们强调了三个特征，每个特征都可以提供有力的证据来识别MZM。首先，耗散抑制有限的能量Caroli-DE Gennes-Matricon（CDGM）电导峰到山谷中，而不会将MZM零偏置电导峰分开。其次，我们预测零偏置电导峰的耗散依赖性缩放特征。第三，引入的耗散通过抑制非主张CDGM模式来表现MZM信号。重要的是，对这些功能的观察不需要量化的电导值$ 2E^2/h $。
It is predicted that a vortex in a topological superconductor contains a Majorana zero mode (MZM). The confirmative Majorana signature, i.e., the $2e^2/h$ quantized conductance, however is easily sabotaged by unavoidable interruptions, e.g. instrument broadening, non-Majorana signal, and extra particle channels. We propose to avoid the signal interruption by introducing disorder-induced dissipation that couples to the tip-sample tunneling. With dissipation involved, we highlight three features, each of which alone can provide a strong evidence to identify MZM. Firstly, dissipation suppresses a finite-energy Caroli-de Gennes-Matricon (CdGM) conductance peak into a valley, while it does not split MZM zero-bias conductance peak. Secondly, we predict a dissipation-dependent scaling feature of the zero-bias conductance peak. Thirdly, the introduced dissipation manifests the MZM signal by suppressing non-topological CdGM modes. Importantly, the observation of these features does not require a quantized conductance value $2e^2/h$.
