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231109|2023 sz s a eng d |
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|a 10.3390/nano13010038
|2 doi
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|a koha001009373
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|c RU-ToGU
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|a Superlattices of gadolinium and bismuth based thallium dichalcogenides as potential magnetic topological insulators
|c A. Yu. Vyazovskaya, E. K. Petrov, Yu. M. Koroteev [et al.]
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|a Текст
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|a электронный
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|a Библиогр.: 111 назв.
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|a Using relativistic spin-polarized density functional theory calculations we investigate magnetism, electronic structure and topology of the ternary thallium gadolinium dichalcogenides TlGdZ2 (Z = Se and Te) as well as superlattices on their basis. We find TlGdZ2 to have an antiferromagnetic exchange coupling both within and between the Gd layers, which leads to frustration and a complex magnetic structure. The electronic structure calculations reveal both TlGdSe2 and TlGdTe2 to be topologically trivial semiconductors. However, as we show further, a three-dimensional (3D) magnetic topological insulator (TI) state can potentially be achieved by constructing superlattices of the TlGdZ2/(TlBiZ2)n type, in which structural units of TlGdZ2 are alternated with those of the isomorphic TlBiZ2 compounds, known to be non-magnetic 3D TIs. Our results suggest a new approach for achieving 3D magnetic TI phases in such superlattices which is applicable to a large family of thallium rare-earth dichalcogenides and is expected to yield a fertile and tunable playground for exotic topological physics.
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|a теория функционала плотности
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|a магнитные свойства
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|a электронная структура
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|a топологические изоляторы
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|a статьи в журналах
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|a Vyazovskaya, Alexandra Yu.
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|a Petrov, Evgeny K.
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|a Koroteev, Yury M.
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|a Bosnar, Mihovil
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|a Silkin, Igor V.
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|a Chulkov, Evgueni V.
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|a Otrokov, Mikhail M.
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|t Nanomaterials
|d 2023
|g Vol. 13, № 1. P. 38 (1-14)
|x 2079-4991
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|a RU-ToGU
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|u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001009373
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|a статья
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|d 1009373
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