2016/05/31 by Masahiko G. Yamada, Hiroyuki Fujita, Masaki Oshikawa
Physics and Astronomy · #cond-mat.mtrl-sci #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1103/physrevlett.119.057202
published as Phys. Rev. Lett. 119, 057202 (2017) · 6+11 pages, 2+7 figures, 0+1 table; the final submitted version to appear in PRL
arxiv created 2017/06/06 · arxiv updated 2017/08/07
Kitaev's honeycomb lattice spin model is a remarkable exactly solvable model, which has a particular type of spin liquid (Kitaev spin liquid) as the ground state. Although its possible realization in iridates and α-RuCl3 has been vigorously discussed recently, these materials have substantial non-Kitaev direct exchange interactions and do not have a spin liquid ground state. We propose metal-organic frameworks (MOFs) with Ru3+ (or Os3+) forming the honeycomb lattice as promising candidates for a more ideal realization of Kitaev-type spin models where the direct exchange interaction is strongly suppressed. The great flexibility of MOFs allows generalization to other three-dimensional lattices, for potential realization of a variety of spin liquids such as a Weyl spin liquid.