Volume 119, Number 5, September 2017
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||21 November 2017|
Floquet Weyl nodes in Weyl semimetal via a one-photon resonance
1 College of Science, Hohai University - Nanjing 210098, China
2 School of Electronic Engineering, Nanjing Xiaozhuang University - Nanjing 211171, China
3 National Laboratory of Solid State Microstructures, Nanjing University - Nanjing 210093, China
Received: 5 July 2017
Accepted: 21 October 2017
Topological phase transition under the influence of periodic driving is regarded as one of the major topics in materials science. For most materials, we usually expect a full dynamical gap opened at the resonance energy , which can convert a topologically trivial state into a Floquet topological insulator state. However, according to both analytical and numerical calculations, we find that new Weyl nodes emerge on the resonance sphere when a Weyl semimetal is irradiated by any kind of continuous driving. These nodes are called Floquet Weyl nodes due to linear dispersion around them. In general cases, we can find four Floquet Weyl nodes, which have the same chiralities with the equilibrium Weyl node.
PACS: 75.47.-m – Magnetotransport phenomena; materials for magnetotransport / 03.65.Vf – Phases: geometric; dynamic or topological / 73.43.-f – Quantum Hall effects
© EPLA, 2017
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