Unconventional quantum Hall effect in Floquet topological insulators

2016/07/20 by M. Tahir, M Tahir, P. Vasilopoulos +3
Materials Science · Physics and Astronomy · #Antisymmetric relation #Chemical and Physical Properties of Materials #Floquet theory #Fractional quantum Hall effect #Landau quantization #Quantum Hall effect #Quantum and electron transport phenomena #Quantum anomalous Hall effect #Quantum spin Hall effect #Topological Materials and Phenomena #Topological insulator #Topological order #cond-mat.mes-hall

paper · pdf · doi:10.1088/0953-8984/28/38/385302

Accepted in J. Phys. Condensed Matter july 2016

arxiv created 2016/07/20 · openalex publication_date 2016/07/27 · openalex created_date 2016/08/23 · arxiv updated 2016/08/24 · openalex updated_date 2026/08/05

Abstract

We study an unconventional quantum Hall effect for the surface states of ultrathin Floquet topological insulators in a perpendicular magnetic field. The resulting band structure is modified by photon dressing and the topological property is governed by the low-energy dynamics of a single surface. An exchange of symmetric and antisymmetric surface states occurs by reversing the light's polarization. We find a novel quantum Hall state in which the zeroth Landau level undergoes a phase transition from a trivial insulator state, with Hall conductivity [Formula: see text] at zero Fermi energy, to a Hall insulator state with [Formula: see text]. These findings open new possibilities for experimentally realizing nontrivial quantum states and unusual quantum Hall plateaus at [Formula: see text].

Citations

• Resonant manifestations of chiral excitons in Faraday and Kerr effects in a topological insulator film
• Thin films of a three-dimensional topological insulator in a strong magnetic field: Microscopic study
• Topological insulators and superconductors
• Massive Dirac fermions and spin physics in an ultrathin film of topological insulator
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Two-dimensional surface state in the quantum limit of a topological insulator
• The birth of topological insulators
• Topological Insulators
• Experimental observation of the quantum Hall effect and Berry's phase in graphene
• Observation of topological surface state quantum Hall effect in an intrinsic three-dimensional topological insulator
• Rubidium-Rich Asymptotic Giant Branch Stars
• Off-resonant polarized light-controlled thermoelectric transport in ultrathin topological insulators