article published yes Dorota Gotfryd author Ekaterina Paerschke author 8275014E-6063-11E9-9B7F-6338E66974250000-0003-0853-8182 Krzysztof Wohlfeld author Andrzej M. Oleś author MiLe department ISTplus - Postdoctoral Fellowships project 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. https://research-explorer.ista.ac.at/download/8726/8727/2020_CondensedMatter_Gotfryd.pdf application/pdfno MDPI2020 eng 2410-3896 2009.1177310.3390/condmat5030053 53 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. D. Gotfryd, E. Paerschke, K. Wohlfeld, and A. M. Oleś, “Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling,” <i>Condensed Matter</i>, vol. 5, no. 3. MDPI, 2020. Gotfryd, D., Paerschke, E., Wohlfeld, K., &#38; Oleś, A. M. (2020). Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling. <i>Condensed Matter</i>. MDPI. <a href="https://doi.org/10.3390/condmat5030053">https://doi.org/10.3390/condmat5030053</a> Gotfryd, Dorota, Ekaterina Paerschke, Krzysztof Wohlfeld, and Andrzej M. Oleś. “Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling.” <i>Condensed Matter</i>. MDPI, 2020. <a href="https://doi.org/10.3390/condmat5030053">https://doi.org/10.3390/condmat5030053</a>. Gotfryd, Dorota, et al. “Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling.” <i>Condensed Matter</i>, vol. 5, no. 3, 53, MDPI, 2020, doi:<a href="https://doi.org/10.3390/condmat5030053">10.3390/condmat5030053</a>. Gotfryd D, Paerschke E, Wohlfeld K, Oleś AM. Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling. <i>Condensed Matter</i>. 2020;5(3). doi:<a href="https://doi.org/10.3390/condmat5030053">10.3390/condmat5030053</a> D. Gotfryd, E. Paerschke, K. Wohlfeld, A.M. Oleś, Condensed Matter 5 (2020). 87262020-11-06T07:21:00Z2025-04-14T07:43:50Z