Far infrared cyclotron resonance and Faraday effect in Bi2Se3
Abstract
The complex Faraday angle and transmission for the topological insulator Bi2Se3 were measured in the far infrared in magnetic fields up to 8 T and analyzed in terms of a simple Drude-Lorentz magneto-plasma dielectric model. Bulk carriers dominate the optical response. The bulk carriers are electrons as we determined from the sign of the Faraday angle. We obtain the bulk band edge cyclotron mass mcb = 0.16 +- 0.01 me and free electron concentration in the 1017 range. Electron-phonon interaction effects were found to be weak.
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