Laser-irradiated Kondo insulators : Controlling Kondo effect and topological phases

Abstract

We theoretically investigate the nature of laser-irradiated Kondo insulators. Using Floquet theory and slave boson approach, we study a periodic Anderson model and derive an effective model which describes the laser-irradiated Kondo insulators. In this model, we find two generic effects induced by laser light. One is the dynamical localization, which suppresses hopping and hybridization. The other is the laser-induced hopping and hybridization, which can be interpreted as a synthetic spin-orbit coupling or magnetic field. The first effect drastically changes the behavior of the Kondo effect. Especially, the Kondo effect under laser light qualitatively changes its character depending on whether the hybridization is on-site or off-site. The second effect triggers topological phase transitions. In topological Kondo insulators, linearly polarized laser light realizes phase transitions between trivial, weak topological, and strong topological Kondo insulators. Moreover, circularly polarized laser light breaks time-reversal symmetry and induces Weyl semimetallic phases. Our results pave the new way to dynamically control the Kondo effect and topological phases in heavy fermion systems. We also discuss experimental setups to detect the signatures.

16 pages, 19 figures

References in corpus (8)

• Topological Insulators with Inversion Symmetry
• Photovoltaic Hall effect in graphene
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Photo-Induced Topological Phase Transition and a Single Dirac-Cone State in Silicene
• Correlated electron systems periodically driven out of equilibrium: Floquet + DMFT formalism
• Theory of photoinduced Floquet Weyl semimetal phases
• Optical freezing of charge motion in an organic conductor
• Heavy Weyl fermion state in CeRu${}_4$Sn${}_6$

Cited by in corpus (9)

• Supercurrent-induced topological phase transitions
• Floquet theory of photoinduced topological phase transitions in the organic salt $\alpha$-(BEDT-TTF)${}_2$I${}_3$ irradiated with elliptically polarized light
• Topological d-wave superconductivity in two dimensions
• Predicted Photo-Induced Topological Phases in Organic Salt $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Cavity-enhanced Kondo effect
• Predicted novel type of photoinduced topological phase transition accompanied by collision and collapse of Dirac-cone pair in organic salt $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Floquet engineering multi-channel Kondo physics
• Magnetic Order in Laser-Irradiated Kagome Antiferromagnets
• Dynamically generated quadrupole polarization using Floquet adiabatic evolution