Majorana bound states and nonlocal spin correlations in a quantum wire on an unconventional superconductor
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
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 Z2 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.
Details
Originalsprache | Englisch |
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Aufsatznummer | 117002 |
Fachzeitschrift | Physical review letters |
Jahrgang | 110 |
Ausgabenummer | 11 |
Publikationsstatus | Veröffentlicht - 12 März 2013 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |