2008/07/08 by Arnab Sen, Fa Wang, Kedar Damle +2 · 17 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Antiferromagnetism #Condensed matter physics #Exchange interaction #Ferromagnetism #Ising model #Lattice (music) #Paramagnetism #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum mechanics #Semiclassical physics #Spin (aerodynamics) #Spins #Theoretical and Computational Physics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.102.227001
published in Physical Review Letters 102(22), 227001 (American Physical Society) · 4 pages, 3 eps figures
arxiv created 2008/07/08 · openalex publication_date 2009/06/02 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider S>3/2 kagome and triangular lattice magnets with strong easy-axis single-ion anisotropy D and antiferromagnetic exchange J. When D>>J, the low energy states selected by the anisotropy map onto configurations of the corresponding classical Ising antiferromagnet. Subleading O(J;3S/D;2) multispin interaction arising from the transverse quantum dynamics makes the low-temperature behavior very different from the well-known classical case: The kagome magnet goes into a semiclassical spin-liquid state with distinctive and unusual short-range correlations below a crossover temperature T;* approximately 0.08J;3S/D;2, while the triangular magnet undergoes a first-order transition at Tc approximately 0.1J;3S/D;2 to an orientationally ordered collinear state that gives rise to a novel zero-magnetization plateau for small magnetic fields along the easy axis. Possible experimental implications are also discussed.