Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials

Abstract The graphene family materials are two-dimensional staggered monolayers with a gapped energy band structure due to intrinsic spin-orbit coupling. The mass gaps in these materials can be manipulated on-demand via biasing with a static electric field, an off-resonance circularly polarized lase...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rajesh K. Malla, Wilton J. M. Kort-Kamp
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
Materias:
R
Q
Acceso en línea:https://doaj.org/article/0885df11ecdc41288152800f774bf708
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:0885df11ecdc41288152800f774bf708
record_format dspace
spelling oai:doaj.org-article:0885df11ecdc41288152800f774bf7082021-12-02T15:38:12ZNonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials10.1038/s41598-021-89219-y2045-2322https://doaj.org/article/0885df11ecdc41288152800f774bf7082021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89219-yhttps://doaj.org/toc/2045-2322Abstract The graphene family materials are two-dimensional staggered monolayers with a gapped energy band structure due to intrinsic spin-orbit coupling. The mass gaps in these materials can be manipulated on-demand via biasing with a static electric field, an off-resonance circularly polarized laser, or an exchange interaction field, allowing the monolayer to be driven through a multitude of topological phase transitions. We investigate the dynamics of spin-orbit coupled graphene family materials to unveil topological phase transition fingerprints embedded in the nonlinear regime and show how these signatures manifest in the nonlinear Kerr effect and in third-harmonic generation processes. We show that the resonant nonlinear spectral response of topological fermions can be traced to specific Dirac cones in these materials, enabling characterization of topological invariants in any phase by detecting the cross-polarized component of the electromagnetic field. By shedding light on the unique processes involved in harmonic generation via topological phenomena our findings open an encouraging path towards the development of novel nonlinear systems based on two-dimensional semiconductors of the graphene family.Rajesh K. MallaWilton J. M. Kort-KampNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Rajesh K. Malla
Wilton J. M. Kort-Kamp
Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials
description Abstract The graphene family materials are two-dimensional staggered monolayers with a gapped energy band structure due to intrinsic spin-orbit coupling. The mass gaps in these materials can be manipulated on-demand via biasing with a static electric field, an off-resonance circularly polarized laser, or an exchange interaction field, allowing the monolayer to be driven through a multitude of topological phase transitions. We investigate the dynamics of spin-orbit coupled graphene family materials to unveil topological phase transition fingerprints embedded in the nonlinear regime and show how these signatures manifest in the nonlinear Kerr effect and in third-harmonic generation processes. We show that the resonant nonlinear spectral response of topological fermions can be traced to specific Dirac cones in these materials, enabling characterization of topological invariants in any phase by detecting the cross-polarized component of the electromagnetic field. By shedding light on the unique processes involved in harmonic generation via topological phenomena our findings open an encouraging path towards the development of novel nonlinear systems based on two-dimensional semiconductors of the graphene family.
format article
author Rajesh K. Malla
Wilton J. M. Kort-Kamp
author_facet Rajesh K. Malla
Wilton J. M. Kort-Kamp
author_sort Rajesh K. Malla
title Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials
title_short Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials
title_full Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials
title_fullStr Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials
title_full_unstemmed Nonlinear dynamics of topological Dirac fermions in 2D spin-orbit coupled materials
title_sort nonlinear dynamics of topological dirac fermions in 2d spin-orbit coupled materials
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/0885df11ecdc41288152800f774bf708
work_keys_str_mv AT rajeshkmalla nonlineardynamicsoftopologicaldiracfermionsin2dspinorbitcoupledmaterials
AT wiltonjmkortkamp nonlineardynamicsoftopologicaldiracfermionsin2dspinorbitcoupledmaterials
_version_ 1718386153321660416