2008/07/14 by Oleg Janson, O. Janson, Johannes Richter +3 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1088/1742-6596/145/1/012008
published as J. Phys.: Conf. Ser. 145 (2009) 012008 · 4 pages, 4 figures. A paper for the proceedings of the HFM 2008 conference
arxiv created 2008/07/14 · openalex publication_date 2009/01/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Spin-1/2 magnets with kagomé geometry, being for years a generic object of theoretical investigations, have few real material realizations. Recently, a DFT-based microscopic model for two such materials, kapellasite Cu 3 Zn(OH) 6 Cl 2 and haydeeite Cu 3 Mg(OH) 6 Cl 2 , was presented [Janson O, Richter J and Rosner H arxiv:0806.1592 ]. Here, we focus on the intrinsic properties of real spin-1/2 kagomé materials having influence on the magnetic ground state and the low-temperature excitations. We find that the values of exchange integrals are strongly dependent on O—H distance inside the hydroxyl groups, present in most spin-1/2 kagomé compounds up to date. Besides the original kagomé model, considering only the nearest neighbour exchange, we emphasize the crucial role of the exchange along the diagonals of the kagomé lattice.