Issue |
EPL
Volume 105, Number 1, January 2014
|
|
---|---|---|
Article Number | 17004 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/105/17004 | |
Published online | 03 February 2014 |
Floquet Weyl semimetal induced by off-resonant light
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University Nanjing 210093, China
Received: 14 November 2013
Accepted: 3 January 2014
We propose that a Floquet Weyl semimetal state can be induced in three-dimensional topological insulators, either non-magnetic or magnetic, by the application of off-resonant light. The virtual photon processes play a critical role in renormalizing the Dirac mass and so resulting in a topological semimetal with vanishing gap at Weyl points. The present mechanism via off-resonant light is quite different from that via on-resonant light, the latter being recently suggested to give rise to a Floquet topological state in ordinary band insulators.
PACS: 73.20.At – Surface states, band structure, electron density of states / 73.43.Nq – Quantum phase transitions / 03.65.Vf – Phases: geometric; dynamic or topological
© EPLA, 2014
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