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Strain manipulation of Majorana fermions in graphene armchair nanoribbons

Title
Strain manipulation of Majorana fermions in graphene armchair nanoribbons
Type
Article in International Scientific Journal
Year
2018
Authors
Wang, ZH
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
Lin, HQ
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
Journal
Title: Physical Review BImported from Authenticus Search for Journal Publications
Vol. 97
ISSN: 2469-9950
Other information
Authenticus ID: P-00N-J9J
Abstract (EN): Graphene nanoribbons with armchair edges are studied for externally enhanced but realistic parameter values: enhanced Rashba spin-orbit coupling due to proximity to a transition-metal dichalcogenide, such as WS2, and enhanced Zeeman field due to exchange coupling with a magnetic insulator, such as EuS under an applied magnetic field. The presence of s-wave superconductivity, induced either by proximity or by decoration with alkali-metal atoms, such as Ca or Li, leads to a topological superconducting phase with Majorana end modes. The topological phase is highly sensitive to the application of uniaxial strain with a transition to the trivial state above a critical strain well below 0.1%. This sensitivity allows for real-space manipulation of Majorana fermions by applying nonuniform strain profiles. Similar manipulation is also possible by applying an inhomogeneous Zeeman field or chemical potential.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 6
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