Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Correlated Electrons: Poster
TT 37.50: Poster
Wednesday, March 19, 2025, 15:00–18:00, P4
Exact t2g1 Superexchange Hamiltonians for Complex Orbital Ordering — •Amit Chauhan, Xue-Jing Zhang, and Eva Pavarini — Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany
We derive exact superexchange interactions for t2g1 systems with spin-orbit coupling. To this end we extend the formalism developed in [1], which we have successfully used in [2,3] to study the origin of orbital ordering. As first application we consider the case of cubic and tetragonal lattices and study the stability of complex orbital ordering in the presence of spin-orbit interaction and crystal-field splitting.
[1] X.-J.Zhang, E.Koch, E.Pavarini, Phys.Rev. B 105, 115104 (2022);
[2] X.-J.Zhang, E.Koch, E.Pavarini, Phys.Rev. B 102, 035113 (2020);
[3] X.-J.Zhang, E. Koch, E.Pavarini, Phys.Rev. B 106, 115110 (2022).
Keywords: Orbital ordering; Spin-orbit coupling; Super-exchange interaction; Crystal-field splitting