2021/03/15 by Naoya Arakawa, Kenji Yonemitsu
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Exchange interaction #Ferromagnetism #Floquet theory #Hamiltonian (control theory) #Limit (mathematics) #Materials science #Mathematical analysis #Mathematics #Mott insulator #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin–orbit interaction #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.103.l100408
published as Phys. Rev. B 103, L100408 (2021) · 5 pages, 2 figures; published version
openalex publication_date 2021/03/15 · arxiv created 2021/03/16 · arxiv updated 2021/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We propose a method for controlling the exchange interactions of Mott insulators with strong spin-orbit coupling. We consider a multiorbital system with strong spin-orbit coupling and a circularly polarized light field and derive its effective Hamiltonian in the strong-interaction limit. Applying this theory to a minimal model of \ensuremathα\text\ensuremath-RuCl3, we show that the magnitudes and signs of three exchange interactions, J, K, and \mathrm\ensuremathΓ, can be changed simultaneously. Then, considering another case in which one of the hopping integrals has a different value and the other parameters are the same as those for \ensuremathα\text\ensuremath-RuCl3, we show that the Heisenberg interaction J can be made much smaller than the anisotropic exchange interactions K and \mathrm\ensuremathΓ.