Engineering one-dimensional topological phases on p -wave superconductors

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2017-05-18
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Language
en
Pages
1-8
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Physical Review B, Volume 95, issue 18
Abstract
In this paper, we study how, with the aid of impurity engineering, two-dimensional p-wave superconductors can be employed as a platform for one-dimensional topological phases. We discover that, while chiral and helical parent states themselves are topologically nontrivial, a chain of scalar impurities on both systems supports multiple topological phases and Majorana end states. We develop an approach which allows us to extract the topological invariants and subgap spectrum, even away from the center of the gap, for the representative cases of spinless, chiral, and helical superconductors. We find that the magnitude of the topological gaps protecting the nontrivial phases may be a significant fraction of the gap of the underlying superconductor.
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Sahlberg, I, Westström, A, Pöyhönen, K & Ojanen, T 2017, ' Engineering one-dimensional topological phases on p -wave superconductors ', Physical Review B, vol. 95, no. 18, 184512, pp. 1-8 . https://doi.org/10.1103/PhysRevB.95.184512