Topological Structures in Unconventional Scenario for 2D Cuprates
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
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Topological Structures in Unconventional Scenario for 2D Cuprates
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| Автор |
Moskvin, A. S.
Panov, Y. D. |
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| Тематика |
CHARGE DEGREE OF FREEDOM
HIGH-TC CUPRATES S = 1 PSEUDOSPIN FORMALISM TOPOLOGICAL STRUCTURES UNCONVENTIONAL SKYRMIONS CHARGE TRANSFER COPPER COMPOUNDS DEGREES OF FREEDOM (MECHANICS) DOMAIN WALLS OXIDE SUPERCONDUCTORS QUANTUM OPTICS SEMICONDUCTOR METAL BOUNDARIES DEGREE OF FREEDOM HIGH-TC CUPRATES PSEUDOSPIN SKYRMIONS TOPOLOGICAL STRUCTURE TOPOLOGY |
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| Описание |
Numerous experimental data point to cuprates as d-d charge transfer unstable systems whose description implies the inclusion of the three many-electron valence states CuO47−,6−,5− (nominally Cu1+,2+,3+) on an equal footing as a well-defined charge triplet. We introduce a minimal model to describe the charge degree of freedom in cuprates with the on-site Hilbert space reduced to only the three states and make use of the S = 1 pseudospin formalism. The formalism constitutes a powerful method to study complex phenomena in interacting quantum systems characterized by the coexistence and competition of various ordered states. Overall, such a framework provides a simple and systematic methodology to predict and discover new kinds of orders. In particular, the pseudospin formalism provides the most effective way to describe different topological structures, in particular, due to a possibility of a geometrical two-vector description of the on-site states. We introduce and analyze effective pseudospin Hamiltonian with on-site and inter-site charge correlations, two types of a correlated one-particle transfer and two-particle, or the composite boson transfer. The latter is of a principal importance for the HTSC perspectives. The 2D S = 1 pseudospin system is prone to a creation of different topological structures, which form topologically protected inhomogeneous distributions of the eight local S = 1 pseudospin order parameters. We present a short overview of localized topological structures, typical for S = 1 (pseudo)spin systems, focusing on unexpected antiphase domain walls in parent cuprates and so-called quadrupole skyrmion, which are believed to be candidates for a topological charge excitation in parent or underdoped cuprates. Puzzlingly, these unconventional structures can be characterized by an uniform distribution of the mean on-site charge, that makes these invisible for X-rays. Quasi-classical approximation and computer simulation are applied to analyze localized topological defects and evolution of the domain structures in “negative-U” model under charge order-superfluid phase transition. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
Ministry of Education and Science of the Russian Federation, Minobrnauka: 2277, 5719 Acknowledgements One of the authors (ASM) would like to thank A. Bianconi, R. Micnas, A. Menushenkov, and S.-L. Drechsler for helpful discussions. The work supported by Act 211 Government of the Russian Federation, agreement No 02.A03.21.0006 and by the Ministry of Education and Science, projects 2277 and 5719. |
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| Дата |
2024-04-23T11:10:42Z
2024-04-23T11:10:42Z 2019 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) info:eu-repo/semantics/submittedVersion |
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| Идентификатор |
Moskvin, A. S., & Panov, Y. D. (2019). Topological structures in unconventional scenario for 2D cuprates. Journal of Superconductivity and Novel Magnetism, 32(1), 61–84. doi:10.1007/s10948-018-4896-0
1557-1939 Final All Open Access, Green https://arxiv.org/pdf/2301.11951 http://elar.urfu.ru/handle/10995/132528 10.1007/s10948-018-4896-0 85055720598 000457312200009 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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| Формат |
application/pdf
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| Издатель |
Springer New York LLC
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| Источник |
Journal of Superconductivity and Novel Magnetism
Journal of Superconductivity and Novel Magnetism |
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