Multiterminal Coulomb-Majorana Junction
Multiterminal Coulomb-Majorana Junction
复制标题
DOI：
10.1103/physrevlett.110.196401
复制
发表时间：
2013-05-06
影响因子：
8.6
通讯作者：
Egger, Reinhold
中科院分区：
文献类型：
--
作者：
Altland, Alexander;Egger, Reinhold
我们研究多个螺旋纳米线附近的一个共同的介观超导岛，马约拉纳费米子束缚态形成。我们发现，一个弱的有限充电能量的中心岛可能会显着影响系统的低能量行为。而对于强的充电相互作用，连接线的交界处，低于一个非普适阈值的相互作用可能会触发流向一个异国情调的近藤固定点。在任一种情况下，无限电容（接地）设备的理想Andreev反射固定点特性由于相互作用而变得不稳定。
We study multiple helical nanowires in proximity to a common mesoscopic superconducting island, where Majorana fermion bound states are formed. We show that a weak finite charging energy of the center island may dramatically affect the low-energy behavior of the system. While for strong charging interactions, the junction decouples the connecting wires, interactions lower than a nonuniversal threshold may trigger the flow towards an exotic Kondo fixed point. In either case, the ideally Andreev reflecting fixed point characteristic for infinite capacitance (grounded) devices gets destabilized by interactions.