论文标题
琐碎的Andreev频段模仿长rashba纳米线的非本地电导中重新打开拓扑散装间隙
Trivial Andreev band mimicking topological bulk gap reopening in the non-local conductance of long Rashba nanowires
论文作者
论文摘要
我们考虑了一个一维的Rashba纳米线，其中多个Andreev绑定的状态在纳米线的大部分中形成了Andreev Band。我们表明，在某些情况下，这款琐碎的Andreev频带可以在纳米线的非本地电导中产生明显的闭合和重新打开散装带隙的签名。此外，我们表明，在非本地电导率中，琐碎的体积重新打开（BRS）的存在基本上不受纳米末端两端的局部电导率的额外存在的额外存在。琐碎的BRS和ZBP同时出现通过所谓的“拓扑间隙协议”所需的基本特征。因此，我们的结果提供了一个拓扑最小的模型，可以通过该模型进行基准测试。
We consider a one-dimensional Rashba nanowire in which multiple Andreev bound states in the bulk of the nanowire form an Andreev band. We show that, under certain circumstances, this trivial Andreev band can produce an apparent closing and reopening signature of the bulk band gap in the non-local conductance of the nanowire. Furthermore, we show that the existence of the trivial bulk reopening signature (BRS) in non-local conductance is essentially unaffected by the additional presence of trivial zero-bias peaks (ZBPs) in the local conductance at either end of the nanowire. The simultaneous occurrence of a trivial BRS and ZBPs mimics the basic features required to pass the so-called "topological gap protocol". Our results therefore provide a topologically trivial minimal model by which the applicability of this protocol can be benchmarked.
