Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 15: Poster I
MA 15.28: Poster
Dienstag, 18. März 2025, 10:00–12:30, P1
Observation of the spiral spin liquid in a triangular-lattice material — •Nikita Andriushin1, Stanislav Nikitin2, Oystein Fjellvag2,3, John White2, Andrey Podlesnyak4, Dmytro Inosov1, Marein Rahn6,1, Marcus Schmidt5, Michael Baenitz5, and Aleksandr Sukhanov6,1 — 1TU Dresden, Germany — 2PSI, Switzerland — 3IFE, Norway — 4ORNL, USA — 5MPI CPfS, Dresden, Germany — 6Augsburg University, Germany
The spiral spin liquid (SSL) is a highly degenerate state characterized by a continuous contour or surface in reciprocal space spanned by a spiral propagation vector. Although the SSL state has been predicted in a number of various theoretical models, very few materials are so far experimentally identified to host such a state. Via combined single-crystal wide-angle and small-angle neutron scattering, we report observation of the SSL in the quasi-two-dimensional delafossite-like AgCrSe2 [1]. We show that it is a very close realization of the ideal Heisenberg J1–J2–J3 frustrated model on the triangular lattice. By supplementing our experimental results with microscopic spin-dynamics simulations, we demonstrate how such exotic magnetic states are driven by thermal fluctuations and exchange frustration.
[1] N. D. Andriushin, et al., arXiv:2410.04954 (2024).
Keywords: spiral spin liquid; triangular lattice; neutron scattering