Magneto-optical conductivity in a topological insulator

Abstract

Adding a small subdominant quadratic in momentum term to a dominant linear Dirac dispersion curve affects conduction and valence band differently and leads to an hourglass-like structure for energy as a function of momentum. This applies to the protected surface states in topological insulators. The energies of the conduction and valence band Landau levels are also different and this leads to the splitting of optical absorption lines produced by the magnetic field, which acquire a two peak structure. It also changes the peaks in the imaginary part of the Hall conductivity into two distinct contributions of opposite signs. The real part of the circularly polarized optical conductivity however retains its single peak structure but the peaks in right and left handedness case are shifted in energy with respect to each other in contrast to the pure Dirac case. The magnitude of the semiclassical cyclotron frequency is significantly modified by the presence of a mass term as is its variation with value of the chemical potential $\mu$. Its optical spectral weight is found to decrease with increasing $\mu$ rather than increase as it does in the pure Dirac limit.

11 pages, 8 figures, to appear in PRB

References in corpus (12)

• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Magneto-optical conductivity in Graphene
• Giant Faraday rotation in single- and multilayer graphene
• Landau level spectroscopy of ultrathin graphite layers
• Infrared spectroscopy of Landau levels in graphene
• On the universal AC optical background in graphene
• Anomalous Absorption Line in the Magneto-Optical Response of Graphene
• Optical conductivity of bilayer graphene with and without an asymmetry gap
• Dirac electronic states in graphene systems: Optical spectroscopy studies
• Optical Signatures of the Tunable Band Gap and Valley-Spin Coupling in Silicene
• Effect of Holstein phonons on the electronic properties of graphene
• Impact of Electron-Phonon Coupling on Near-Field Optical Spectra

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• Optical investigation of thermoelectric topological crystalline insulator Pb${}_{0.77}$Sn${}_{0.23}$Se
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