Engineering one-dimensional topological phases on p -wave superconductors

Research output: Contribution to journalArticleScientificpeer-review

Standard

Engineering one-dimensional topological phases on p -wave superconductors. / Sahlberg, Isac; Westström, Alex; Pöyhönen, Kim; Ojanen, Teemu.

In: Physical Review B, Vol. 95, No. 18, 184512, 18.05.2017, p. 1-8.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

APA

Vancouver

Author

Bibtex - Download

@article{d451388902674b1fb8ce5f76c70a4217,
title = "Engineering one-dimensional topological phases on p -wave superconductors",
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.",
author = "Isac Sahlberg and Alex Weststr{\"o}m and Kim P{\"o}yh{\"o}nen and Teemu Ojanen",
year = "2017",
month = "5",
day = "18",
doi = "10.1103/PhysRevB.95.184512",
language = "English",
volume = "95",
pages = "1--8",
journal = "Physical Review B (Condensed Matter and Materials Physics)",
issn = "2469-9950",
publisher = "American Physical Society",
number = "18",

}

RIS - Download

TY - JOUR

T1 - Engineering one-dimensional topological phases on p -wave superconductors

AU - Sahlberg, Isac

AU - Westström, Alex

AU - Pöyhönen, Kim

AU - Ojanen, Teemu

PY - 2017/5/18

Y1 - 2017/5/18

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85024373156&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.95.184512

DO - 10.1103/PhysRevB.95.184512

M3 - Article

VL - 95

SP - 1

EP - 8

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

SN - 2469-9950

IS - 18

M1 - 184512

ER -

ID: 14468949