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Majorana Bound States and Nonlocal Spin Correlations in a Quantum Wire on an Unconventional Superconductor
Stockholm University, Faculty of Science, Department of Physics.
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 110, no 11, 117002- p.Article in journal (Refereed) Published
Abstract [en]

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.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-89554DOI: 10.1103/PhysRevLett.110.117002ISI: 000316172500022OAI: oai:DiVA.org:su-89554DiVA: diva2:619151
Funder
Swedish Research Council
Note

AuthorCount:5;

Available from: 2013-05-02 Created: 2013-04-29 Last updated: 2017-12-06Bibliographically approved

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