Artículos de revistas
Floquet interface states in illuminated three-dimensional topological insulators
Fecha
2015-06Registro en:
Calvo, Hernan Laureano; Foa Torres, Luis Eduardo Francisco; Pérez Piskunow, Pablo Matías; Balseiro, Carlos Antonio; Usaj, Gonzalo; Floquet interface states in illuminated three-dimensional topological insulators; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 91; 24; 6-2015; 241404-241404
1098-0121
CONICET Digital
CONICET
Autor
Calvo, Hernan Laureano
Foa Torres, Luis Eduardo Francisco
Pérez Piskunow, Pablo Matías
Balseiro, Carlos Antonio
Usaj, Gonzalo
Resumen
Recent experiments showed that the surface of a three-dimensional topological insulator develops gaps in the Floquet-Bloch band spectrum when illuminated with a circularly polarized laser. These Floquet-Bloch bands are characterized by nontrivial Chern numbers which only depend on the helicity of the polarization of the radiation field. Here we propose a setup consisting of a pair of counterrotating lasers, and show that one-dimensional chiral states emerge at the interface between the two lasers. These interface states turn out to be spin polarized and may trigger interesting applications in the field of optoelectronics and spintronics.