Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 23: Correlated Electrons – Poster I
TT 23.2: Poster
Montag, 9. März 2026, 18:00–20:00, P1
Anisotropic spin models on frustrated lattices: from spin liquids to supersolids — •Martin Ulaga1, Jure Kokalj2,3, Takami Tohyama4, and Peter Prelovšek3 — 1MPIPKS, Dresden, Germany — 2University of Ljubljana, Faculty of civic and geotedic engineering, Ljubljana, Slovenia — 3Institute "Jožef Stefan", Ljubljana, Slovenia — 4Science universigy of Tokyo, Tokyo, Japan
Recent experiments on novel materials, best described by easy-axis spin models on a triangular lattice, stimulated renewed theoretical interest in basic properties of anisotropic spin models on frustrated planar lattices. While the thermodynamic properties of the model on the Kagome lattices are consistent with the spin-liquid scenario in the whole range of anisotropies, the case of the triangular lattice is more complex. Several numerical studies indicate that anisotropic systems should follow the supersolid scenario with broken translation symmetry in the ground state, as well as the transverse magnetic order, implying a gapless Goldstone mode. Confirming this scenario at finite magnetic fields, we find numerically that at zero field, the available evidence points instead to a solid with a finite gap.
Keywords: 2d Heisenberg model; spin supersolid; anisotropy; kagome; triangular