Dresden 2026 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Correlated Magnetism – Spin Liquids I

TT 72.6: Vortrag

Donnerstag, 12. März 2026, 10:45–11:00, HSZ/0105

Evolution of Na₃Co₂SbO₆ under pressure — •Thore Martens¹, Prashanta Mukharjee², Philipp Gegenwart², and Alexander A. Tsirlin¹ — ¹Leipzig University — ²University of Augsburg

Na₃Co₂SbO₆ is a potential candidate for the Kitaev spin liquid where the high-spin S=3/2-state is turned into the J_eff=1/2-state under spin-orbit coupling. Recently, the impact of the trigonal field in Na₃Co₂SbO₆ on the formation of the spin liquid phase has been discussed and theorized that finetuning of the trigonal field by applying pressure may lead to the desired Kitaev state. Therefore, neutron diffraction experiments are performed to obtain the lattice parameters and probe the evolution of the magnetically ordered state of Na₃Co₂SbO₆ under pressure. Using density functional theory, new relaxed unit cells are calculated as well as the subsequent exchange couplings and trigonal field as a function of pressure.

Keywords: Kitaev materials; Honeycomb lattice; DFT; frustrated magnets; numerical methods