2016/04/28 by A. A. Aczel, Ashley M. Cook, A. M. Cook +12
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Antiferromagnetism #Condensed matter physics #Inelastic neutron scattering #Magnetic and transport properties of perovskites and related materials #Neutron #Neutron scattering #Nuclear physics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.93.214426
published as Phys. Rev. B 93, 214426 (2016) · 11 pages, 5 figures. arXiv admin note: text overlap with arXiv:1507.07920
arxiv created 2016/04/28 · openalex publication_date 2016/06/20 · openalex created_date 2016/06/24 · arxiv updated 2016/06/29 · openalex updated_date 2026/08/05
A special type of anisotropic spin exchange called the ``Kitaev interaction'' provides rare exactly-soluble models of gapless quantum spin liquids in 2d and 3d. The main goals of this work were to identify other lattice geometries that support the elusive Kitaev interactions and understand the magnetic properties of such materials. By performing inelastic neutron scattering on La2MgIrO6 and La2ZnIrO6, the authors find that these magnets, which possess long-range antiferromagnetic order, yield clear signatures of gapped and nearly-dispersionless magnon excitations. They also show that spin-wave models with a dominant Kitaev interaction can naturally account for the magnetic ordering pattern as well as the inelastic neutron scattering data.