Floquet Weyl Magnons in Three-Dimensional Quantum Magnets

Owerre, S. A.

doi:10.1038/s41598-018-28508-5

Cited by 16 publications

(16 citation statements)

References 79 publications

(104 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Still using the effective Hamiltonian formulation, all such Floquet-topological phases have been systematically classified [58]. It has also been used to propose the Floquet topological Magnon [59][60][61]. Floquet phases can even have topological properties that have no equivalent in the groundstate.…”

Section: Photon-driven Floquet Systems 41 Topological Floquet Matermentioning

confidence: 99%

Floquet analysis of excitations in materials

Giovannini

Hübener

2019

J. Phys. Mater.

View full text Add to dashboard Cite

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 realizing Floquet phases in solid state materials. We discuss how a wide range of experiments with non-equilibrium electronic structure can be viewed by employing Floquet theory as an analysis tool providing a different view of excitations in solids.

show abstract

Section: Photon-driven Floquet Systems 41 Topological Floquet Matermentioning

confidence: 99%

Floquet analysis of excitations in materials

Giovannini

Hübener

2019

J. Phys. Mater.

View full text Add to dashboard Cite

show abstract

“…In this respect, the concept of magnonic Floquet Chern insulator has emerged 41–43 , where circularly-polarized light induces a dynamical Dzyaloshinskii-Moriya (DM) interaction 47–49 in a single-layer two-dimensional (2D) insulating honeycomb ferromagnet. This approach has also been generalized to engineer Floquet Weyl magnons 50 in three-dimensional (3D) insulating honeycomb ferromagnets. Similar to electronic Floquet system, time-reversal symmetry is broken by circularly-polarized electric field and the Floquet topological system is characterized by the first Chern number.…”

Section: Introductionmentioning

confidence: 99%

Magnonic Floquet Quantum Spin Hall Insulator in Bilayer Collinear Antiferromagnets

Owerre

2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

We study irradiated two-dimensional insulating bilayer honeycomb ferromagnets and antiferromagnets coupled antiferromagnetically with a zero net magnetization. The former is realized in the recently synthesized bilayer honeycomb chromium triiodide CrI 3 . In both systems, we show that circularly-polarized electric field breaks time-reversal symmetry and induces a dynamical Dzyaloshinskii-Moriya interaction in each honeycomb layer. However, the resulting bilayer antiferromagnetic system still preserves a combination of time-reversal and space-inversion ( ) symmetry. We show that the magnon topology of the bilayer antiferromagnetic system is characterized by a Floquet topological invariant. Therefore, the system realizes a magnonic Floquet quantum spin Hall insulator with spin filtered magnon edge states. This leads to a non-vanishing Floquet magnon spin Nernst effect, whereas the Floquet magnon thermal Hall effect vanishes due to symmetry. We study the rich Floquet topological magnon phase diagram of the system as a function of the light amplitudes and polarizations. We further discuss the great impact of the results on future experimental realizations.

show abstract

“…The concept of periodically driven magnetic insulators rely on the spin magnetic dipole moments carried by the underlying magnon excitations as previously introduced in quantum ferromagnets [24,26,28]. In other words, charge-neutral bosonic quasiparticles can interact with an electromagnetic field through their spin magnetic dipole moment.…”

Section: A Theoretical Formulationmentioning

confidence: 99%

Photo-induced Floquet Weyl magnons in noncollinear antiferromagnets

Owerre

2019

Annals of Physics

View full text Add to dashboard Cite

We study periodically driven insulating noncollinear stacked kagome antiferromagnets with a conventional symmetry-protected three-dimensional (3D) in-plane 120 • spin structure, with either positive or negative vector chirality. We show that the symmetry protection of the in-plane 120 • spin structure can be broken in the presence of an off-resonant circularly or linearly polarized electric field propagating parallel to the in-plane 120 • spin structure (say along the x direction). Consequently, topological Floquet Weyl magnon nodes with opposite chirality are photoinduced along the kx momentum direction. They manifest as the monopoles of the photoinduced Berry curvature. We also show that the system exhibits a photoinduced magnon thermal Hall effect for circularly polarized electric field. Furthermore, we show that the photoinduced chiral spin structure is a canted 3D in-plane 120 • spin structure, which was recently observed in the equilibrium noncollinear antiferromagnetic Weyl semimetals Mn3Sn/Ge. Our result not only paves the way towards the experimental realization of Weyl magnons and photoinduced thermal Hall effects, but also provides a powerful mechanism for manipulating the intrinsic properties of 3D topological antiferromagnets.arXiv:1810.04675v5 [cond-mat.str-el]

show abstract

Floquet Weyl Magnons in Three-Dimensional Quantum Magnets

Cited by 16 publications

References 79 publications

Floquet analysis of excitations in materials

Floquet analysis of excitations in materials

Magnonic Floquet Quantum Spin Hall Insulator in Bilayer Collinear Antiferromagnets

Photo-induced Floquet Weyl magnons in noncollinear antiferromagnets

Contact Info

Product

Resources

About