Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session H44: Topological Insulators Including SmB6
2:30 PM–5:30 PM,
Tuesday, March 6, 2018
LACC Room: 504
Sponsoring Unit: DCMP
Chair: Luis Balicas, Natl High Magnetic Field Lab
Abstract: H44.00015 : Laser-irradiated Kondo insulators: Controlling the Kondo effect and topological phases*
5:18 PM–5:30 PM
(CEMS, RIKEN )
We investigate theoretically the nature of laser-irradiated Kondo insulators. Using Floquet theory and the slave-boson approach, we study a periodic Anderson model and derive an effective model that describes laser-irradiated Kondo insulators. In this model, we find two generic effects induced by laser light. One is dynamical localization, which suppresses hopping and hybridization. The other is laser-induced hopping and hybridization, which can be interpreted as synthetic spin-orbit coupling or a magnetic field. The first effect drastically changes the behavior of the Kondo effect. The second effect triggers topological phase transitions.Our results make it possible to dynamically control the Kondo effect and topological phases in heavy-fermion systems. We also discuss experimental setups to detect the signatures.
*This work is supported by a Grant-in-Aid for Scientific Research on Innovative Areas Topological Materials Science (KAKENHI Grant No. 15H05855) and also JSPS KAKENHI (Grants No. 16J05078, No. 14J01328, and No. 16K05501).
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