DÓRA, Balázs; CAYSSOL, Jérôme; SIMON, Ferenc; MOESSNER, Roderich

doi:10.1103/PhysRevLett.108.056602

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DÓRA, Balázs
Department of Physics [Budapest]
BME-MTA Exotic Quantum Phases Research Group

CAYSSOL, Jérôme
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Department of Physics [Berkeley]
Max Planck Institute for the Physics of Complex Systems [MPI-PKS]

SIMON, Ferenc
Department of Physics [Budapest]

Langue

Article de revue

Ce document a été publié dans

Physical Review Letters. 2012, vol. 108, n° 5, p. 056602

American Physical Society

Résumé en anglais

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.< Réduire

Mots clés en anglais

Spin polarized transport in semiconductors

Phases: geometric - dynamic or topological

Spin transport effects

Graphene

DOI

http://dx.doi.org/10.1103/PhysRevLett.108.056602

Projet Européen

Spin dynamics and transport at the quantum edge in low dimensional nanomaterials

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798