2018/02/04 by Ravi Yadav, Stephan Rachel, Liviu Hozoi +2 · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Condensed matter physics #Coupling (piping) #Ferromagnetism #Hamiltonian (control theory) #Heisenberg model #Honeycomb #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Materials science #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum mechanics #Quantum spin liquid #Spin polarization #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.98.121107
published as Phys. Rev. B 98, 121107(R) (2018) · 6 pages, 2 figures
arxiv created 2018/02/04 · openalex created_date 2018/02/23 · openalex publication_date 2018/09/20 · arxiv updated 2018/10/18 · openalex updated_date 2026/08/06
A range of honeycomb-lattice compounds has been proposed and investigated in the search for a topological Kitaev spin liquid. However, sizable Heisenberg interactions and additional symmetry-allowed exchange anisotropies in the magnetic Hamiltonian of these potential Kitaev materials push them away from the pure Kitaev spin-liquid state. Particularly the Kitaev-to-Heisenberg coupling ratio is essential in this respect. With the help of advanced quantum-chemistry methods, we explore how the magnetic coupling ratios depend on strain and pressure in several honeycomb compounds (Na2IrO3, \ensuremathβ\ensuremath-Li2IrO3, and \ensuremathα\ensuremath-RuCl3). We find that the Heisenberg and Kitaev terms are affected differently: For strain, in particular, the Heisenberg component decreases more rapidly than the Kitaev counterpart. This provides a scenario where strain can stabilize a spin liquid in such materials.