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Modulated Floquet Topological Insulators

2013; American Physical Society; Volume: 110; Issue: 1 Linguagem: Inglês

10.1103/physrevlett.110.016802

1092-0145

Yaniv Tenenbaum Katan, Daniel K. Podolsky,

Quantum many-body systems

Floquet topological insulators are topological phases of matter generated by the application of time-periodic perturbations on otherwise conventional insulators. We demonstrate that spatial variations in the time-periodic potential lead to localized quasi-stationary states in two-dimensional systems. These states include one-dimensional interface modes at the nodes of the external potential, and fractionalized excitations at vortices of the external potential. We also propose a setup by which light can induce currents in these systems. We explain these results by showing a close analogy to px+ipy superconductors.