Optically engineering the topological properties of a spin Hall insulator
CAYSSOL, Jérôme
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Department of Physics [Berkeley]
Max Planck Institute for the Physics of Complex Systems [MPI-PKS]
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Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Department of Physics [Berkeley]
Max Planck Institute for the Physics of Complex Systems [MPI-PKS]
CAYSSOL, Jérôme
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Department of Physics [Berkeley]
Max Planck Institute for the Physics of Complex Systems [MPI-PKS]
< Reduce
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Department of Physics [Berkeley]
Max Planck Institute for the Physics of Complex Systems [MPI-PKS]
Language
en
Article de revue
This item was published in
Physical Review Letters. 2012, vol. 108, n° 5, p. 056602
American Physical Society
English Abstract
Time-periodic perturbations can be used to engineer topological properties of matter by altering the Floquet band structure. This is demonstrated for a spin Hall insulator in the presence of monochromatic circularly polarized ...Read more >
Time-periodic perturbations can be used to engineer topological properties of matter by altering the Floquet band structure. This is demonstrated for a spin Hall insulator in the presence of monochromatic circularly polarized light. The inherent spin structure of the edge state is influenced by the Zeeman coupling and not by the orbital effect. The photocurrent (and the magnetization along the edge) develops a finite, helicity dependent expectation value and turns from dissipationless to dissipative with increasing radiation frequency, signalling a change in the topological properties. The connection with Thouless' charge pumping and non-equilibrium Zitterbewegung is discussed, together with possible experiments.Read less <
English Keywords
Spin polarized transport in semiconductors
Phases: geometric - dynamic or topological
Spin transport effects
Graphene
European Project
Spin dynamics and transport at the quantum edge in low dimensional nanomaterials
Origin
Hal imported