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Article overview
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Majorana Fermions in Strongly Interacting Helical Liquids | | Eran Sela
; Alexander Altland
; Achim Rosch
; | | Date: |
25 Mar 2011 | | Abstract: | Majorana fermions have been shown to occur at edges and interfaces of gapped
one-dimensional systems where phases with different topological character meet.
Those phases may exist due to an interplay of spin-orbit coupling,
proximity-induced superconductivity and external magnetic fields in helical
liquids even in the absence of interactions. Here we investigate the effect of
strong interactions, and construct the corresponding phase diagram. We find
that strong interactions can suppress proximity-induced superconductivity
completely, thereby stabilizing gapless fermionic excitations, which mix with
Majorana states near interfaces. This may jeopardize long term Majorana
coherence, unless elaborate read-out schemes relying on total fermion number
parity are employed. | | Source: | arXiv, 1103.4969 | | Services: | Forum | Review | PDF | Favorites | |
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