Engineering one-dimensional topological phases on p -wave superconductors

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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.

Details

Original languageEnglish
Article number184512
Pages (from-to)1-8
JournalPhysical Review B
Volume95
Issue number18
Publication statusPublished - 18 May 2017
MoE publication typeA1 Journal article-refereed

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