In a Kane-Mele topological insulator driven by circularly polarized light, Rashba spin-orbit coupling induces spin precession in a Floquet sideband, producing switchable one-way spin-polarized photocurrents.
Electric-field-tuned topological phase transition in ultrathin Na3Bi,
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Spin precession and laser-induced spin-polarized photocurrents
In a Kane-Mele topological insulator driven by circularly polarized light, Rashba spin-orbit coupling induces spin precession in a Floquet sideband, producing switchable one-way spin-polarized photocurrents.