Optical Conductivity of Topological Insulator Thin Films in a Quantizing Magnetic Field

Abstract

We determine the optical response of topological insulator thin films in the presence of a quantizing, external magnetic field. We explicitly take into account hybridization between the states of top and bottom surface. The interplay between hybridization and Zeeman energies gives rise to topological and normal insulator phases and phase transitions between them. The optical response in the two phases and at the phase transition point is investigated. We show that the difference in magneto-optical response can be used to distinguish the topological phase from the normal phase of the system. Further, the optical response also allows us to determine the gap generated by hybridization between top and bottom surface states of topological insulator thin films.

arXiv comment17 pages, 15 figures

References in corpus (33)

• Topological Insulators
• Topological insulators and superconductors
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
• Model Hamiltonian for Topological Insulators
• Magneto-optical conductivity in Graphene
• Hexagonal Warping Effects in the Surface States of Topological Insulator Bi${}_2$Te${}_3$
• Massive Dirac fermions and spin physics in an ultrathin film of topological insulator
• Oscillatory crossover from two dimensional to three dimensional topological insulators
• Topological Phase Transition and Texture Inversion in a Tunable Topological Insulator
• Strong surface scattering in ultrahigh mobility Bi2Se3 topological insulator crystals
• Landau Quantization of Massless Dirac Fermions in Topological Insulator
• Quintuple-layer epitaxy of high-quality Bi2Se3 thin films for topological insulator
• Anomalous Finite Size Effects on Surface States in the Topological Insulator Bi${}_2$Se${}_3$
• Evidence for electron-electron interaction in topological insulator thin films
• Exciton condensation and charge fractionalization in a topological insulator film
• On the universal AC optical background in graphene
• In-plane transport and enhanced thermoelectric performance in thin films of the topological insulators Bi_2Te_3 and Bi_2Se_3
• Valley-Spin Polarization in the Magneto-Optical Response of Silicene and Other Similar 2D Crystals
• Anomalous Absorption Line in the Magneto-Optical Response of Graphene
• Optical conductivity of bilayer graphene with and without an asymmetry gap
• Magneto-Optical Conductivity of Silicene and Other Buckled Honeycomb Lattices
• Optical Signatures of the Tunable Band Gap and Valley-Spin Coupling in Silicene
• Widespread spin polarization effects in photoemission from topological insulators
• Longitudinal and spin/valley Hall optical conductivity in single layer $Mo{S}_2$
• Parallel magnetic field driven quantum phase transition in a thin topological insulator film
• Magneto-optical conductivity in a topological insulator
• Thin topological insulator film in a perpendicular magnetic field
• Magneto-optical conductivity in graphene including electron-phonon coupling
• Optical properties of magnetically doped ultra-thin topological insulator slabs
• Calculation of divergent photon absorption in ultrathin films of a topological insulator

Cited by in corpus (3)

• Magneto-optical transport properties of monolayer WSe2
• Magneto-optical properties of topological insulator thin films with broken inversion symmetry
• Integer quantum Hall effect and topological phase transitions in silicene