Multiterminal Coulomb-Majorana Junction

被引：84
作者：
Altland, Alexander [1 ]
Egger, Reinhold [2 ]
机构：
[1] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany
[2] Univ Dusseldorf, Inst Theoret Phys, D-40225 Dusseldorf, Germany
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 19期
关键词：
NANOWIRE; SUPERCONDUCTOR; SIGNATURE; FERMIONS;
D O I：
10.1103/PhysRevLett.110.196401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：5
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