Floquet analysis of excitations in materials

@article{Giovannini2019FloquetAO,
  title={Floquet analysis of excitations in materials},
  author={Umberto De Giovannini and Hannes H{\"u}bener},
  journal={Journal of Physics: Materials},
  year={2019},
  volume={3}
}
Controlled excitation of materials can transiently induce changed or novel properties with many fundamental and technological implications. Especially, the concept of Floquet engineering and the manipulation of the electronic structure via dressing with external lasers have attracted some recent interest. Here we review the progress made in defining Floquet material properties and give a special focus on their signatures in experimental observables as well as considering recent experiments… 

Floquet engineering the band structure of materials with optimal control theory

We demonstrate that the electronic structure of a material can be deformed into Floquet pseudobands with arbitrarily tailored shapes. We achieve this goal with a combination of quantum optimal

Exciton-coherence generation through diabatic and adiabatic dynamics of Floquet state

Floquet engineering of electronic systems is a promising way of controlling quantum material properties on an ultrafast time scale. So far, the energy structure of Floquet states in solids has been

Moir\'e-Floquet engineering of quantum materials: a review

We review recent work on quantum materials driven by light, emphasizing van der Waals systems hosting Moire superlattices. These non-equilibrium systems combine the twist-angle sensitivity of the

Coherent dynamics of Floquet-Bloch states in monolayer WS2 reveals fast adiabatic switching

Floquet engineering offers a path to optically-controlled materials, but experimental implementations have frequently relied on femtosecond pulses to achieve the high peak fields required to maximise

A thermodynamic probe of the topological phase transition in epitaxial graphene based Floquet topological insulator

One can use light to tune certain materials, from a trivial to a topological phase. A prime example of such materials, classified as Floquet topological insulators (FTI), is epitaxial graphene. In

A thermodynamic probe of the topological phase transition in a Floquet topological insulator

In certain materials light can be used to tune the material from a trivial phase to a topological phase. These materials are classified as Floquet topological insulator (FTI). In this paper, we probe

Ultrafast investigation and control of Dirac and Weyl semimetals

Ultrafast experiments using sub-picosecond pulses of light are poised to play an important role in the study and use of topological materials and, particularly, of the three-dimensional Dirac and

Light-induced emergent phenomena in 2D materials and topological materials

Light–matter interaction in 2D and topological materials provides a fascinating control knob for inducing emergent, non-equilibrium properties and achieving new functionalities in the ultrafast

Electron-phonon coupling induced intrinsic Floquet electronic structure

Floquet states are a topic of intense contemporary interest, which is often induced by coherent external oscillating perturbation (e.g., laser, or microwave) which breaks the continuous time

References

SHOWING 1-10 OF 113 REFERENCES

Floquet Engineering of Quantum Materials

Floquet engineering, the control of quantum systems using periodic driving, is an old concept in condensed matter physics dating back to ideas such as the inverse Faraday effect. However, there is a

Modulated Floquet topological insulators.

It is demonstrated that spatial modulation of light allows for remarkable control of the properties in these systems and a close analogy to p-wave superconductors is used to explain the results.

Optically engineering the topological properties of a spin Hall insulator.

Time-periodic perturbations can be used to engineer topological properties of matter by altering the Floquet band structure and the connection with Thouless' charge pumping and nonequilibrium zitterbewegung is discussed, together with possible experiments.

An optically stimulated superconducting-like phase in K3C60 far above equilibrium Tc

The control of non-equilibrium phenomena in complex solids is an important research frontier, encompassing new effects like light induced superconductivity. Here, we show that coherent optical

Floquet topological insulator in semiconductor quantum wells

Topological phases of matter have captured our imagination over the past few years, with tantalizing properties such as robust edge modes and exotic non-Abelian excitations, and potential

Theory of Floquet band formation and local pseudospin textures in pump-probe photoemission of graphene.

It is predicted that short optical pulses attainable in experiments can lead to local spectral gaps and novel pseudospin textures in graphene by identifying new states with optically induced nontrivial changes of sublattice mixing that leads to Berry curvature corrections of electrical transport and magnetization.

Towards properties on demand in quantum materials.

Emerging strategies for selectively perturbing microscopic interaction parameters are described, which can be used to transform materials into a desired quantum state and outline a potential roadmap to an era of quantum phenomena on demand.

Creating stable Floquet–Weyl semimetals by laser-driving of 3D Dirac materials

It is shown by first principles calculations how femtosecond laser pulses with circularly polarized light can be used to switch between WeylSemimetal, Dirac semimetal and topological insulator states in a prototypical three-dimensional Dirac material, Na3Bi.

Topological Floquet-Thouless Energy Pump.

We explore adiabatic pumping in the presence of a periodic drive, finding a new phase in which the topologically quantized pumped quantity is energy rather than charge. The topological invariant is

Photoinduced transition between conventional and topological insulators in two-dimensional electronic systems.

It is shown how the electron system can be tuned through phases associated with different Chern numbers as the laser intensity is adiabatically swept, i.e., a photoinduced analog of the quantum Hall plateau transition.
...