Journal Article

PUBDB-2017-10018

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Creating stable Floquet–Weyl semimetals by laser-driving of 3D Dirac materials

Hübener, H. (Corresponding author)CFEL*MPG* ; Sentef, M. A. ; De Giovannini, U.CFEL* ; Kemper, A. F. ; Rubio, A. (Corresponding author)CFEL*

2017
Macmillan London

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Please use a persistent id in citations: doi:10.1038/ncomms13940  doi:10.3204/PUBDB-2017-10018

Abstract: Tuning and stabilizing topological states, such as Weyl semimetals, Dirac semimetals or topological insulators, is emerging as one of the major topics in materials science. Periodic driving of many-body systems offers a platform to design Floquet states of matter with tunable electronic properties on ultrafast timescales. Here we show by first principles calculations how femtosecond laser pulses with circularly polarized light can be used to switch between Weyl semimetal, Dirac semimetal and topological insulator states in a prototypical three-dimensional (3D) Dirac material, Na3Bi. Our findings are general and apply to any 3D Dirac semimetal. We discuss the concept of time-dependent bands and steering of Floquet–Weyl points and demonstrate how light can enhance topological protection against lattice perturbations. This work has potential practical implications for the ultrafast switching of materials properties, such as optical band gaps or anomalous magnetoresistance.

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Contributing Institute(s):

1. Forschungsgruppe für strukturelle Dynamik (MPSD)
2. MPSD (CFEL-QOX)
3. MPSD (CFEL-MPT)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2017

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