Evolution of spin-orbital entanglement with increasing ising spin-orbit coupling Gotfryd, Dorota Paerschke, Ekaterina ; https://orcid.org/0000-0003-0853-8182 Wohlfeld, Krzysztof Oleś, Andrzej M. ddc:530 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. MDPI 2020 info:eu-repo/semantics/article doc-type:Article Article http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/8726 https://research-explorer.ista.ac.at/download/8726/8727 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> eng info:eu-repo/semantics/altIdentifier/doi/10.3390/condmat5030053 info:eu-repo/semantics/altIdentifier/issn/2410-3896 info:eu-repo/semantics/altIdentifier/arxiv/2009.11773 info:eu-repo/semantics/openAccess