Engineering one-dimensional topological phases on p -wave superconductors

Loading...
Thumbnail Image

Access rights

openAccess

URL

Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Authors

Sahlberg, Isac
Westström, Alex
Pöyhönen, Kim
Ojanen, Teemu

Date

2017-05-18

Major/Subject

Mcode

Degree programme

Language

en

Pages

1-8

Series

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.

Description

Keywords

Other note

Citation

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