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Topological Superconductivity and Majorana Fermions in RKKY Systems
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2833846
Author(s) Klinovaja, Jelena; Stano, Peter; Yazdani, Ali; Loss, Daniel
Author(s) at UniBasel Klinovaja, Jelena
Loss, Daniel
Year 2013
Title Topological Superconductivity and Majorana Fermions in RKKY Systems
Journal Physical review letters
Volume 111
Number 18
Pages / Article-Number 186805
Abstract We consider quasi-one-dimensional Ruderman-Kittel-Kasuya-Yosida (RKKY) systems in proximity to an s-wave superconductor. We show that a 2k(F) peak in the spin susceptibility of the superconductor in the one-dimensional limit supports helical order of localized magnetic moments via RKKY interaction, where k(F) is the Fermi wave vector. The magnetic helix is equivalent to a uniform magnetic field and very strong spin-orbit interaction (SOI) with an effective SOI length 1/2k(F). We find the conditions to establish such a magnetic state in atomic chains and semiconducting nanowires with magnetic atoms or nuclear spins. Generically, these systems are in a topological phase with Majorana fermions. The inherent self-tuning of the helix to 2k(F) eliminates the need to tune the chemical potential.
Publisher American Physical Society
ISSN/ISBN 0031-9007
URL https://arxiv.org/pdf/1307.1442.pdf
edoc-URL http://edoc.unibas.ch/dok/A6338777
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevLett.111.186805
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/24237550
ISI-Number WOS:000326529600007
Document type (ISI) Journal Article
 
   

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