Topological transitions in two-dimensional Floquet superconductors
arXiv:2108.13798 · doi:10.1103/PhysRevB.106.134508
Abstract
We demonstrate the occurrence of a topological phase transition induced by an effective magnetic field in a two-dimensional electron gas with spin-orbit coupling and in proximity to an -wave superconductor. The effective, perpendicular magnetic field is generated by an in plane, off-resonant ac-magnetic field or by circularly polarized light. The conditions for entering the topological phase do not rely on fine parameter tuning: For fixed frequency, one requires a minimal amplitude of the effective field which can be evaluated analytically. In this phase, chiral edge states generally emerge for a system in stripe geometry unless the Rashba and Dresselhaus coupling have the same magnitude. In this special case, for magnetic field driving the edge states become Majorana flat bands, due to the presence of a chiral symmetry; the light irradiated system is a trivial superconductor.
arXiv comment14 pages; 11 figures
References in corpus (30)
- New directions in the pursuit of Majorana fermions in solid state systems
- Novel Symmetry Classes in Mesoscopic Normal-Superconducting Hybrid Structures
- A generic new platform for topological quantum computation using semiconductor heterostructures
- Topological superconductors: a review
- Observation of Floquet-Bloch states on the surface of a topological insulator
- Evidence of Ising pairing in superconducting NbSe atomic layers
- Transport properties of non-equilibrium systems under the application of light: Photo-induced quantum Hall insulators without Landau levels
- Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
- Floquet Engineering of Quantum Materials
- Non-ballistic spin field-effect transistor
- Majorana Fermions in Equilibrium and Driven Cold Atom Quantum Wires
- Emergence of the persistent spin helix in semiconductor quantum wells
- Brillouin-Wigner theory for high-frequency expansion in periodically driven systems: Application to Floquet topological insulators
- Floquet generation of Majorana end modes and topological invariants
- Transport signatures of Floquet Majorana fermions in driven topological superconductors
- Persistent Spin Textures in Semiconductor Nanostructures
- Floquet Majorana and Para-Fermions in Driven Rashba Nanowires
- Unpaired Floquet Majorana fermions without magnetic fields
- Majorana edge modes in the Kitaev model
- Quantized conductance and large g-factor anisotropy in InSb quantum point contacts
- Floquet Second-Order Topological Superconductor Driven via Ferromagnetic Resonance
- Approaching a topological phase transition in Majorana nanowires
- Laser-induced topological superconductivity in cuprate thin films
- Control of Spin Helix Symmetry in Semiconductor Quantum Wells by Crystal Orientation
- Linear and non-linear transport across a finite Kitaev chain: an exact analytical study
- Majorana Flat Bands in s-Wave Gapless Topological Superconductors
- Majorana quasiparticles in semiconducting carbon nanotubes
- Multiband s-wave topological superconductors: role of dimensionality and magnetic field response
- Datta-and-Das spin transistor controlled by a high-frequency electromagnetic field
- Dynamical generation of Floquet Majorana flat bands in s-wave superconductors