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

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Domain wall induced spin-polarized flat bands in antiferromagnetic topological insulators. / Petrov, E. K.; Men'shov, V. N.; Rusinov, I. P.; Hoffmann, M.; Ernst, A.; Otrokov, M. M.; Dugaev, V. K.; Menshchikova, T.; Chulkov, E.

In: Physical Review B, Vol. 103, No. 23, 235142, 21.06.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{cdd5f5c2e8524804afa2625981b928e9,

title = "Domain wall induced spin-polarized flat bands in antiferromagnetic topological insulators",

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 Neel 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.",

keywords = "TOTAL-ENERGY CALCULATIONS, VALLEY TRANSPORT, CRYSTAL-STRUCTURE, HUBBARD-MODEL, FERROMAGNETISM, STATES, SUPERCONDUCTIVITY, SCHEMES, METALS",

author = "Petrov, {E. K.} and Men'shov, {V. N.} and Rusinov, {I. P.} and M. Hoffmann and A. Ernst and Otrokov, {M. M.} and Dugaev, {V. K.} and T. Menshchikova and E. Chulkov",

year = "2021",

month = jun,

day = "21",

doi = "10.1103/PhysRevB.103.235142",

language = "English",

volume = "103",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "23",

}

RIS

TY - JOUR

T1 - Domain wall induced spin-polarized flat bands in antiferromagnetic topological insulators

AU - Petrov, E. K.

AU - Men'shov, V. N.

AU - Rusinov, I. P.

AU - Hoffmann, M.

AU - Ernst, A.

AU - Otrokov, M. M.

AU - Dugaev, V. K.

AU - Menshchikova, T.

AU - Chulkov, E.

PY - 2021/6/21

Y1 - 2021/6/21

N2 - 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 Neel 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.

AB - 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 Neel 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.

KW - TOTAL-ENERGY CALCULATIONS

KW - VALLEY TRANSPORT

KW - CRYSTAL-STRUCTURE

KW - HUBBARD-MODEL

KW - FERROMAGNETISM

KW - STATES

KW - SUPERCONDUCTIVITY

KW - SCHEMES

KW - METALS

UR - https://www.mendeley.com/catalogue/c83ec992-a8a7-31aa-9f33-114bb33d0f3f/

U2 - 10.1103/PhysRevB.103.235142

DO - 10.1103/PhysRevB.103.235142

M3 - Article

VL - 103

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 23

M1 - 235142

ER -

ID: 88191267