Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 26: Correlated Magnetism – Frustrated Systems
TT 26.3: Vortrag
Mittwoch, 19. März 2025, 10:00–10:15, H33
Revisiting magnetic phases of the Kitaev quantum spin liquid Na3Co2SbO6 — •Kranthi Kumar Bestha1,2, Manaswini Sahoo1,2, Niccolò Francini3, Robert Kluge1, Ryan Christopher Morrow1, Andrey Maljuk1, Sabine Wurmehl1, Sven Luther4, Hannes Kühne4, Bernd Büchner1,2, Laura Teresa Corredor Bohorquez1, Lukas Janssen1, and Anja U. B. Wolter1 — 1Institute for Solid State Research, Leibniz IFW Dresden 01069, Dresden, Germany — 2Institute of Solid State and Materials Physics, TU Dresden, 01062 Dresden, Germany — 3Institute of Theoretical Physics, TU Dresden, 01062 Dresden, Germany — 4Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
The quest for the elusive Kitaev Quantum Spin Liquid phase (KQSL) in Kitaev candidates has resulted in the discovery of unexpected exotic magnetic phases due to competing Kitaev, Heisenberg and off-diagonal interactions in real materials. Honeycomb cobaltate, Na3Co2SbO6 (NCSO) has attracted much interest due to the predictions of its proximity to the KQSL phase. Using magnetic and thermodynamic methods, we mapped out the magnetic phase diagram of high-quality NCSO single crystals for all three main crystallographic directions. We observe a Jeff = 1/2 ground state with antiferromagnetic order (TN = 7 K) and multiple field-induced metamagnetic transitions in three field directions. The observed anisotropy and field-induced transitions are modeled within an extended JK Γ Γ′ model. Our work uncovers new exotic magnetic phases both in-plane and out-of-plane field directions.
Keywords: Honeycomb cobaltates; Quantum Spin Liquid, low-dimensionality; extended Kitaev model; anisotropic magnetic phase diagram; metamagnetic transitions