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Analytical and semianalytical tools to determine the topological character of Shiba chains
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4630359
Author(s) Sedlmayr, Nicholas; Kaladzhyan, Vardan; Bena, Cristina
Author(s) at UniBasel Kaladzhyan, Vardan
Year 2021
Title Analytical and semianalytical tools to determine the topological character of Shiba chains
Journal Physical Review B
Volume 104
Number 2
Pages / Article-Number 024508
Abstract We introduce three analytical and semianalytical tools that allow one to determine the topological character of impurity Shiba chains. The analytical methods are based on calculating the effective Green's function of an infinite embedded chain using the T-matrix formalism and describing the chain as a line impurity. We thus provide a solution to the longstanding size-effects problem affecting the only general alternative method, the numerical tight-binding analysis. As an example we consider a chain of magnetic impurities deposited on an s-wave superconducting substrate with Rashba spin-orbit and we calculate its topological phase diagram as a function of the magnetic impurity strength and the chemical potential. We find a perfect agreement between all our techniques and a numerical analysis.
Publisher American Physical Society
ISSN/ISBN 2469-9950 ; 2469-9969
URL https://link.aps.org/doi/10.1103/PhysRevB.104.024508
edoc-URL https://edoc.unibas.ch/85184/
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevB.104.024508
ISI-Number 000677553400001
Document type (ISI) Article
 
   

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