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TT: Fachverband Tiefe Temperaturen

TT 49: Frustrated Magnets: Strong Spin-Orbit Coupling I

TT 49.5: Vortrag

Mittwoch, 20. März 2024, 16:00–16:15, H 2053

Magnetic ground state of the Kitaev material Na₂Co₂TeO₆ — Wilhelm G. F. Krüger, Niccolò Francini, and •Lukas Janssen — TU Dresden, Dresden, Germany

Among the candidate Kitaev materials, the honeycomb Mott insulator Na₂Co₂TeO₆ has received significant recent attention. The nature of its magnetic ground state, however, has been a matter of considerable debate. We reveal an unusually high symmetry in the single-crystal neutron scattering spectrum that is inconsistent with a zigzag ground state and instead indicates a noncoplanar triple-q magnetic ordering. Implications concerning the proximity of Na₂Co₂TeO₆ to the Kitaev quantum spin liquid will be pointed out as well.

[1] W. G. F. Krüger, W. Chen, X. Jin, Y. Li, L. Janssen, Phys. Rev. Lett. 131 (2023) 146702

[2] N. Francini, L. Janssen, arXiv:2311.08475

Keywords: Kitaev materials; Kitaev-Heisenberg model; Cobaltates; Kitaev quantum spin liquid