Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling

Gotfryd D, Paerschke E, Wohlfeld K, Oleś AM. 2020. Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling. Condensed Matter. 5(3), 53.

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Journal Article | Published | English

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Author
Gotfryd, Dorota; Paerschke, EkaterinaIST Austria ; Wohlfeld, Krzysztof; Oleś, Andrzej M.
Department
Abstract
Several realistic spin-orbital models for transition metal oxides go beyond the classical expectations and could be understood only by employing the quantum entanglement. Experiments on these materials confirm that spin-orbital entanglement has measurable consequences. Here, we capture the essential features of spin-orbital entanglement in complex quantum matter utilizing 1D spin-orbital model which accommodates SU(2)⊗SU(2) symmetric Kugel-Khomskii superexchange as well as the Ising on-site spin-orbit coupling. Building on the results obtained for full and effective models in the regime of strong spin-orbit coupling, we address the question whether the entanglement found on superexchange bonds always increases when the Ising spin-orbit coupling is added. We show that (i) quantum entanglement is amplified by strong spin-orbit coupling and, surprisingly, (ii) almost classical disentangled states are possible. We complete the latter case by analyzing how the entanglement existing for intermediate values of spin-orbit coupling can disappear for higher values of this coupling.
Publishing Year
Date Published
2020-08-26
Journal Title
Condensed Matter
Volume
5
Issue
3
Article Number
53
ISSN
IST-REx-ID

Cite this

Gotfryd D, Paerschke E, Wohlfeld K, Oleś AM. Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling. Condensed Matter. 2020;5(3). doi:10.3390/condmat5030053
Gotfryd, D., Paerschke, E., Wohlfeld, K., & Oleś, A. M. (2020). Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling. Condensed Matter. MDPI. https://doi.org/10.3390/condmat5030053
Gotfryd, Dorota, Ekaterina Paerschke, Krzysztof Wohlfeld, and Andrzej M. Oleś. “Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling.” Condensed Matter. MDPI, 2020. https://doi.org/10.3390/condmat5030053.
D. Gotfryd, E. Paerschke, K. Wohlfeld, and A. M. Oleś, “Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling,” Condensed Matter, vol. 5, no. 3. MDPI, 2020.
Gotfryd D, Paerschke E, Wohlfeld K, Oleś AM. 2020. Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling. Condensed Matter. 5(3), 53.
Gotfryd, Dorota, et al. “Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling.” Condensed Matter, vol. 5, no. 3, 53, MDPI, 2020, doi:10.3390/condmat5030053.
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2020-11-06
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