Strain manipulation of Majorana fermions in graphene armchair nanoribbons

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Wang, ZH (Autor) Outra; Eduardo V Castro (Autor) FCUP; Lin, HQ (Autor) Outra

Revista

Título: Physical Review B

Vol. 97

ISSN: 2469-9950

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 7 Citações

Outras Informações

ID Authenticus: P-00N-J9J

DOI: 10.1103/physrevb.97.041414

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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6