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Ground state and low-temperature magnetism of the quasi-two-dimensional honeycomb compound InCu2/3V1/3O3статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 февраля 2024 г.
- Авторы: Iakovleva M., Janson O., Grafe H.J., Dioguardi A.P., Maeter H., Yeche N., Klauss H.H., Pascua G., Luetkens H., Möller A., Büchner B., Kataev V., Vavilova E.
- Журнал: Physical Review B
- Том: 100
- Номер: 14
- Год издания: 2019
- Издательство: American Physical Society
- Местоположение издательства: United States
- Номер статьи: 144442
- DOI: 10.1103/physrevb.100.144442
- Аннотация: We report a combined 115In nuclear quadrupole resonance, 51V nuclear magnetic resonance, and muon spin-relaxation spectroscopic study of the low-temperature magnetic properties of InCu2/3V1/3O3, a quasi-two-dimensional (2D) compound comprising in the spin sector a honeycomb lattice of antiferromagnetically coupled spins S=1/2 associated with Cu2+ ions. Despite substantial experimental and theoretical efforts, the ground state of this material has not been ultimately identified. In particular, two characteristic temperatures of about 40 and 20 K manifesting themselves as anomalies in different magnetic measurements are discussed controversially. A combined analysis of the experimental data complemented with theoretical calculations of exchange constants enabled us to identify, below 39 K, an “intermediate” quasi-2D static spin state. This spin state is characterized by a staggered magnetization with a temperature evolution that agrees with the predictions for the 2D XY model. We observe that this state gradually transforms at 15 K into a fully developed 3D antiferromagnetic Néel state. We ascribe such an extended quasi-2D static regime to an effective magnetic decoupling of the honeycomb planes due to a strong frustration of the interlayer exchange interactions, which inhibits long-range spin-spin correlations across the planes. Interestingly, we find indications of the topological Berezinsky-Kosterlitz-Thouless transition in the quasi-2D static state of the honeycomb spin-1/2 planes of InCu2/3V1/3O3.
- Добавил в систему: Вавилова Евгения Леонидовна