Majorana Bound States and Nonlocal Spin Correlations in a Quantum Wire on an Unconventional Superconductor
2013 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 110, no 11, 117002- p.Article in journal (Refereed) Published
We study theoretically the proximity effect of a one-dimensional metallic quantum wire (in the absence of spin-orbit interaction) lying on top of an unconventional superconductor. Three different material classes are considered as a substrate: (i) a chiral superconductor in class D with broken time-reversal symmetry and a class DIII superconductor (ii) with and (iii) without a nontrivial Z(2) number. Interestingly, we find degenerate zero energy Majorana bound states at both ends of the wire for all three cases. They are unstable against spin-orbit interaction in case (i), while they are topologically protected by time-reversal symmetry in cases (ii) and (iii). Remarkably, we show that nonlocal spin correlations between the two ends of the wire can be simply controlled by a gate potential in our setup. DOI: 10.1103/PhysRevLett.110.117002
Place, publisher, year, edition, pages
2013. Vol. 110, no 11, 117002- p.
IdentifiersURN: urn:nbn:se:su:diva-89554DOI: 10.1103/PhysRevLett.110.117002ISI: 000316172500022OAI: oai:DiVA.org:su-89554DiVA: diva2:619151
FunderSwedish Research Council