Back to Search Start Over

Domain wall induced spin-polarized flat bands in antiferromagnetic topological insulators

Authors :
Russian Foundation for Basic Research
Russian Science Foundation
Ministry of Education and Science of the Russian Federation
German Research Foundation
National Science Centre (Poland)
Saint Petersburg State University
Petrov, Evgeniy K.
Men'shov, V. N.
Rusinov, Igor P.
Hoffmann, Martin
Ernst, Arthur
Otrokov, M. M.
Dugaev, V. K.
Menshchikova, Tatiana V.
Chulkov, Eugene V.
Russian Foundation for Basic Research
Russian Science Foundation
Ministry of Education and Science of the Russian Federation
German Research Foundation
National Science Centre (Poland)
Saint Petersburg State University
Petrov, Evgeniy K.
Men'shov, V. N.
Rusinov, Igor P.
Hoffmann, Martin
Ernst, Arthur
Otrokov, M. M.
Dugaev, V. K.
Menshchikova, Tatiana V.
Chulkov, Eugene V.
Publication Year :
2021

Abstract

A flat band in fermionic system is a dispersionless single-particle state with a diverging effective mass and nearly zero group velocity. These flat bands are expected to support exotic properties in the ground state, which might be important for a wide range of promising physical phenomena. For many applications, it is highly desirable to have such states in Dirac materials, but so far they have been reported only in some nonmagnetic Dirac systems. In this paper, we propose a realization of topologically protected spin-polarized flat bands generated by domain walls in planar magnetic topological insulators. Using first-principles material design, we suggest a family of intrinsic antiferromagnetic topological insulators with an in-plane sublattice magnetization and high Néel temperature. Such systems can host domain walls in a natural manner. For these materials, we demonstrate the existence of spin-polarized flat bands in the vicinity of the Fermi level and discuss their properties and potential applications.

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1333181713
Document Type :
Electronic Resource