论文标题
在拓扑零偏置电导峰值上进行磨练
Honing in on a topological zero-bias conductance peak
论文作者
论文摘要
拓扑超导体中Majorana绑定状态的流行签名是零能量电导峰值，高度为$ 2E^2/h $。但是，由于非电视论原因，也可能出现相似的零能电导峰值峰值几乎相同的高度。在这里，我们表明，可以通过状态的零能量局部密度和状态的局部磁化密度来区分这些微不足道和拓扑的零能电导峰。我们发现，零能量状态的局部密度在微不足道的零偏置电导峰值上表现出有限周期的振荡。相反，对于拓扑零偏置电导峰值，这些振荡消失了。另一方面，零能量的局部磁化密度显示了微不足道的零偏置电导峰的周期性振荡，而对于拓扑ZBCP，它们消失了。我们的结果表明，状态的零能量局部密度和状态的局部磁化密度可以用作实验探针，以区分琐碎的零能电导峰与拓扑零能量电导峰。
A popular signature of Majorana bound states in topological superconductors is the zero-energy conductance peak with a height of $2e^2/h$. However, a similar zero energy conductance peak with almost the same height can also arise due to non-topological reasons. Here we show that these trivial and topological zero energy conductance peaks can be distinguished via the zero energy local density of states and local magnetization density of states. We find that the zero-energy local density of states exhibits oscillations with a finite period for a trivial zero-bias conductance peak. In contrast, these oscillations disappear for the topological zero-bias conductance peak. On the other hand, zero energy local magnetization density of states shows a periodic oscillation for trivial zero-bias conductance peak, while for topological ZBCP, they vanish. Our results suggest that zero-energy local density of states and local magnetization density of states can be used as an experimental probe to distinguish trivial zero energy conductance peak from topological zero energy conductance peak.
