Floquet engineering of Mott insulators with strong spin-orbit coupling

Abstract

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 $\alpha$-RuCl${}_3$, we show that the magnitudes and signs of three exchange interactions, $J$, $K$, and $\Gamma$, 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 $\alpha$-RuCl${}_3$, we show that the Heisenberg interaction $J$ can be made much smaller than the anisotropic exchange interactions $K$ and $\Gamma$.

5 pages, 2 figures; published version

References in corpus (11)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a Honeycomb Lattice
• Models and Materials for Generalized Kitaev Magnetism
• Equilibrium states of generic quantum systems subject to periodic driving
• Kitaev magnetism in honeycomb RuCl3 with intermediate spin-orbit coupling
• Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for honeycomb lattice iridates A2IrO3
• Magnetization processes of zigzag states on the honeycomb lattice: Identifying spin models for $\alpha$-RuCl${}_3$ and Na${}_2$IrO${}_3$
• Manipulating magnetism by ultrafast control of the exchange interaction
• Kitaev-like honeycomb magnets: Global phase behavior and emergent effective models
• Trigonal distortion in the honeycomb iridates: Proximity of zigzag and spiral phases in Na2IrO3

Cited by in corpus (5)

• Interplay of magnetic field and trigonal distortion in the honeycomb $\Gamma$ model: Occurrence of a spin-flop phase
• Polarization-dependent magnetic properties of periodically driven $\alpha$-RuCl${}_3$
• Symmetry-protected difference between spin Hall and anomalous Hall effects of a periodically driven multiorbital metal
• Photoinduced Pseudospin Polarization in a Three-Orbital Hubbard Model
• Non-Loudon-Fleury Raman scattering in spin-orbit coupled Mott insulators