Engineering one-dimensional topological phases on p -wave superconductors
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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 journal › Article
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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
