Macroscopic degeneracy of zero-mode rotating surface states in 3D Dirac and Weyl semimetals under radiation
arXiv:1512.03753 · doi:10.1103/PhysRevLett.116.156803
Abstract
We investigate the development of novel surface states when 3D Dirac or Weyl semimetals are placed under circularly polarized electromagnetic radiation. We find that the hybridization between inverted Floquet bands opens in general a gap, which closes at so-called exceptional points found for complex values of the momentum. This corresponds to the appearance of midgap surface states in the form of evanescent waves decaying from the surface exposed to the radiation. We observe a phenomenon reminiscent of Landau quantization by which the midgap surface states get a large degeneracy proportional to the radiation flux traversing the surface of the semimetal. We show that all these surface states carry angular current, leading to an angular modulation of their charge that rotates with the same frequency of the radiation, which should manifest in the observation of a macroscopic chiral current in the irradiated surface.
arXiv comment5 pages + supplemental material
References in corpus (26)
- Electric Field Effect in Atomically Thin Carbon Films
- Topological Insulators
- Topological insulators and superconductors
- Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
- Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
- Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
- Floquet Topological Insulator in Semiconductor Quantum Wells
- Experimental discovery of Weyl semimetal TaAs
- Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
- The physics of exceptional points
- Photovoltaic Hall effect in graphene
- Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
- Observation of Floquet-Bloch states on the surface of a topological insulator
- Topological characterization of periodically-driven quantum systems
- Experimental Realization of a Three-Dimensional Dirac Semimetal
- Transport properties of non-equilibrium systems under the application of light: Photo-induced quantum Hall insulators without Landau levels
- Floquet-Bloch theory and topology in periodically driven lattices
- Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon
- Floquet chiral edge states in graphene
- Photoinduced transition between conventional and topological insulators in two-dimensional electronic systems
- Tuning laser-induced bandgaps in graphene
- When chiral photons meet chiral fermions - Photoinduced anomalous Hall effects in Weyl semimetals
- Floquet Weyl Semimetal Induced by Off-Resonant Light
- Floquet interface states in illuminated three-dimensional topological insulators
- Floquet dynamics in two-dimensional semi-Dirac semimetals and three-dimensional Dirac semimetals
- Photoinduced pseudospin effects in silicene beyond the off resonant condition
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- Symmetry and Topology in Non-Hermitian Physics
- Edge Modes, Degeneracies, and Topological Numbers in Non-Hermitian Systems
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- Topological Phases in Non-Hermitian Aubry-André-Harper Models
- Perspective on topological states of non-Hermitian lattices
- Topological Phase Transition driven by Infinitesimal Instability: Majorana Fermions in Non-Hermitian Spintronics
- Winding Numbers and Generalized Mobility Edges in Non-Hermitian Systems
- Surface and 3D quantum Hall effects from engineering of exceptional points in nodal-line semimetals
- Photoinduced Chern insulating states in semi-Dirac materials
- Tunable point nodes from line node semimetals via application of light
- Topological protection from exceptional points in Weyl and nodal line semimetals
- Floquet Weyl semimetal phases in light-irradiated higher-order topological Dirac semimetals
- Controlling Exceptional Points with Light
- Generalized Berry phase for a bosonic Bogoliubov system with exceptional points
- Floquet bound states around defects and adatoms in graphene
- Real spectra, Anderson localization, and topological phases in one-dimensional quasireciprocal systems
- Surface states in topological semimetal slab geometries
- Generating surface states in a Weyl semi-metal by applying electromagnetic radiation
- Electric field manipulation of surface states in topological semimetals
- Localization length versus level repulsion in 1-D driven disordered quantum wires
- Effect of the external fields in high Chern number quantum anomalous Hall insulators
- Floquet boundary states in AB-stacked graphite
- Photoprotected spin Hall effect on graphene with substrate induced Rashba spin-orbit coupling
- Transition between anomalous and Anderson localization in systems with non-diagonal disorder driven by time-periodic fields
- Floquet second-order topological insulator in strained graphene
- Spectroscopic Signatures of a Liouvillian Exceptional Spectral Phase in a Collective Spin