Type-II Weyl cone transitions in driven semimetals
Name
PhysRevB.94.121106.pdf
Size
550.55 KB
Format
Adobe PDF
Checksum (MD5)
70c7e76f4a0185bbce4cb1fdd2a4e1e5
Author(s)
Oh, Yun-Tak
Han, Jung Hoon
Chan, Ching-Kit
Lee, Patrick A
Date Issued
September 2016
Journal
Physical Review B
Publisher
American Physical Society
Citation
Chan, Ching-Kit et al. “Type-II Weyl Cone Transitions in Driven Semimetals.” Physical Review B 94.12 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
Periodically driven systems provide tunable platforms to realize interesting Floquet topological phases and phase transitions. In electronic systems with Weyl dispersions, the band crossings are topologically protected even in the presence of time-periodic perturbations. This robustness permits various routes to shift and tilt the Weyl spectra in the momentum and energy space using circularly polarized light of sufficient intensity. We show that type-II Weyl fermions, in which the Weyl dispersions are tilted with the appearance of pocketlike Fermi surfaces, can be induced in driven Dirac semimetals and line node semimetals. Under a circularly polarized drive, both semimetal systems immediately generate Weyl node pairs whose types can be further controlled by the driving amplitude and direction. The resultant phase diagrams demonstrate experimental feasibilities.
MIT Department
Massachusetts Institute of Technology. Materials Processing Center
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.94.121106
