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Statut |
Confirmé |
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Série |
CONDMAT-ENS |
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Domaines |
cond-mat |
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Date |
Mardi 6 Mars 2012 |
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Heure |
11:30 |
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Institut |
LPTENS |
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Salle |
Conf IV, 24 rue Lhomond (LPT ENS, 2nd floor) |
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Nom de l'orateur |
Bena |
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Prenom de l'orateur |
Cristina |
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Addresse email de l'orateur |
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Institution de l'orateur |
LPS Orsay |
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Titre |
Spin and Majorana polarization in topological superconducting wires |
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Résumé |
We study a one-dimensional wire with strong spin-orbit coupling, which
supports Majorana fermions when subject to a Zeeman magnetic field and in
proximity of a superconductor. Using both analytical and numerical
techniques we calculate the electronic spin texture of the Majorana end
states. Moreover, we define and calculate a local "Majorana polarization"
and "Majorana density" and argue that they can be used as order parameters
to characterize the topological transition between the trivial system and
the system exhibiting Majorana bound modes. We find that the local
"Majorana polarization" is correlated to the transverse spin polarization,
and we propose to test the presence of Majorana fermions in a 1D system by
a spin-polarized density of states measurement. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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