Strong interband Faraday rotation in 3D topological insulator Bi2Se3

Abstract

The Faraday effect is a representative magneto-optical phenomenon, resulting from the transfer of angular momentum between interacting light and matter in which time-reversal symmetry has been broken by an externally applied magnetic field. Here we report on the Faraday rotation induced in the prominent 3D topological insulator Bi2Se3 due to bulk interband excitations. The origin of this non-resonant effect, extraordinarily strong among other non-magnetic materials, is traced back to the specific Dirac-type Hamiltonian for Bi2Se3, which implies that electrons and holes in this material closely resemble relativistic particles with a non-zero rest mass.

arXiv comment6 pages, 3 figures, to be published in Scientific Reports

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• Magneto-optics of massive Dirac fermions in bulk Bi2Se3
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• High-Resolution Faraday Rotation and Electron-Phonon Coupling in Surface States of the Bulk-Insulating Topological Insulator Cu${}_{0.02}$Bi${}_2$Se${}_3$
• Bulk Band Structure of Bi${}_2$Te${}_3$
• Hyperfine coupling and spin polarization in the bulk of the topological insulator Bi${}_2$Se${}_3$
• Dirac cone shift of a passivated topological Bi2Se3 interface state

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• Cold plasma waves in the chiral Maxwell-Carroll-Field-Jackiw electrodynamics
• Theory of electromagnetic wave propagation in ferromagnetic Rashba conductor
• Symmetric and antisymmetric constitutive tensors for bi-isotropic and bi-anisotropic media
• Electromagnetic Radiation in chiral matter: the Cherenkov case
• Anisotropic cold plasma modes in chiral vector Maxwell-Carroll-Field-Jackiw electrodynamics
• Rotatory power reversal induced by magnetic-current in bi-isotropic media
• Double rotatory power reversal, continuous Kerr angle, and enhanced reflectance in bi-isotropic media with anomalous Hall current
• Hypothesis of a bi-isotropic-like plasma permeating the interstellar space