Intrinsic optical conductivity of modified-Dirac fermion systems

Abstract

We analytically calculate the intrinsic longitudinal and transverse optical conductivities of electronic systems which govern by a modified-Dirac fermion model Hamiltonian for materials beyond graphene such as monolayer MoS${}_2$ and ultrathin film of the topological insulator. We analyze the effect of a topological term in the Hamiltonian on the optical conductivity and transmittance. We show that the optical response enhances in the non-trivial phase of the ultrathin film of the topological insulator and the optical Hall conductivity changes sign at transition from trivial to non-trivial phases which has significant consequences on a circular polarization and optical absorption of the system.

arXiv comment14 pages, 9 figures. To appear in Phys. Rev. B

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Cited by in corpus (21)

• Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides
• Theory of strain in single-layer transition metal dichalcogenides
• Effect of Point Defects on the Optical and Transport Properties of MoS2 and WS2
• Valley Zeeman effect and spin-valley polarized conductance in monolayer MoS${}_2$ in a perpendicular magnetic field
• Edge modes in zigzag and armchair ribbons of monolayer MoS${}_2$
• Anisotropic longitudinal optical conductivities of tilted Dirac bands in 1T${}^{\prime }$-MoS${}_2$
• Valley- and spin-switch effects in molybdenum disulfide superconducting spin valve
• Spin-resolved optical conductivity of two-dimensional group-VIB transition-metal dichalcogenides
• Direction dependent giant optical conductivity in 2D \textit{semi}-Dirac materials
• Photonic spin Hall effect in Haldane model materials
• Signatures of Lifshitz transition in the optical conductivity of two-dimensional tilted Dirac materials
• Optical responses and optical activity of ultrathin films of topological insulator
• Valley Hall Transport of Photon-Dressed Quasiparticles in 2D Dirac Semiconductors
• Valley- and spin-filter in monolayer MoS${}_2$
• Photogalvanic currents in dynamically gapped Dirac materials
• Magneto-optical properties of topological insulator thin films with broken inversion symmetry
• Low-temperature thermal transport and thermopower of monolayer transition metal dichalcogenide semiconductors
• Perfect valley polarization in MoS2
• Intra-cell dynamics and cyclotron motion without magnetic field
• Effects of Strain-Induced Pseudogauge Fields on Exciton Dispersion, Transport, and Interactions in Transition Metal Dichalcogenides Nanoribbons
• Universal absorption of two-dimensional systems