TY - JOUR

T1 - Topological Magnetic Materials of the (MnSb2Te4)(Sb2Te3)(n) van der Waals Compounds Family

AU - Eremeev, S.

AU - Rusinov, I. P.

AU - Koroteev, Yu M.

AU - Vyazovskaya, A. Yu

AU - Hoffmann, M.

AU - Echenique, P. M.

AU - Ernst, A.

AU - Otrokov, M. M.

AU - Chulkov, E.

N1 - Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/5/6

Y1 - 2021/5/6

N2 - Using density functional theory, we propose the (MnSb2Te4)center dot(Sb2Te3)(n) family of stoichiometric van der Waals compounds that harbor multiple topologically nontrivial magnetic phases. In the ground state, the first three members of the family (n = 0, 1, 2) are 3D antiferromagnetic topological insulators, while for n >= 3 a special phase is formed, in which a nontrivial topological order coexists with a partial magnetic disorder in the system of the decoupled 2D ferromagnets, whose magnetizations point randomly along the third direction. Furthermore, due to a weak interlayer exchange coupling, these materials can be field-driven into the FM Weyl semimetal (n = 0) or FM axion insulator states (n >= 1). Finally, in two dimensions, we reveal these systems to show intrinsic quantum anomalous Hall and AFM axion insulator states, as well as quantum Hall state, achieved under external magnetic field. Our results demonstrate that MnSb2Te4 is not topologically trivial as was previously believed that opens possibilities of realization of a wealth of topologically nontrivial states in the (MnSb2Te4)center dot(Sb2Te3)(n) family.

AB - Using density functional theory, we propose the (MnSb2Te4)center dot(Sb2Te3)(n) family of stoichiometric van der Waals compounds that harbor multiple topologically nontrivial magnetic phases. In the ground state, the first three members of the family (n = 0, 1, 2) are 3D antiferromagnetic topological insulators, while for n >= 3 a special phase is formed, in which a nontrivial topological order coexists with a partial magnetic disorder in the system of the decoupled 2D ferromagnets, whose magnetizations point randomly along the third direction. Furthermore, due to a weak interlayer exchange coupling, these materials can be field-driven into the FM Weyl semimetal (n = 0) or FM axion insulator states (n >= 1). Finally, in two dimensions, we reveal these systems to show intrinsic quantum anomalous Hall and AFM axion insulator states, as well as quantum Hall state, achieved under external magnetic field. Our results demonstrate that MnSb2Te4 is not topologically trivial as was previously believed that opens possibilities of realization of a wealth of topologically nontrivial states in the (MnSb2Te4)center dot(Sb2Te3)(n) family.

KW - GAP

UR - https://arxiv.org/pdf/2102.02532.pdf

UR - http://www.scopus.com/inward/record.url?scp=85106143959&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/1fc868e5-8a27-3af1-a840-55a5f86a1f86/

U2 - 10.1021/acs.jpclett.1c00875

DO - 10.1021/acs.jpclett.1c00875

M3 - Article

VL - 12

SP - 4268

EP - 4277

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 17

ER -