Topological magnetoplasmon

Dafei Jin, Ling Lu (), Zhong Wang, Chen Fang, John D. Joannopoulos, Marin Soljačić, Liang Fu and Nicholas X. Fang ()
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Dafei Jin: Massachusetts Institute of Technology
Ling Lu: Institute of Physics, Chinese Academy of Sciences/Beijing National Laboratory for Condensed Matter Physics
Zhong Wang: Institute for Advanced Study, Tsinghua University
Chen Fang: Institute of Physics, Chinese Academy of Sciences/Beijing National Laboratory for Condensed Matter Physics
John D. Joannopoulos: Massachusetts Institute of Technology
Marin Soljačić: Massachusetts Institute of Technology
Liang Fu: Massachusetts Institute of Technology
Nicholas X. Fang: Massachusetts Institute of Technology

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Classical wave fields are real-valued, ensuring the wave states at opposite frequencies and momenta to be inherently identical. Such a particle–hole symmetry can open up new possibilities for topological phenomena in classical systems. Here we show that the historically studied two-dimensional (2D) magnetoplasmon, which bears gapped bulk states and gapless one-way edge states near-zero frequency, is topologically analogous to the 2D topological p+ip superconductor with chiral Majorana edge states and zero modes. We further predict a new type of one-way edge magnetoplasmon at the interface of opposite magnetic domains, and demonstrate the existence of zero-frequency modes bounded at the peripheries of a hollow disk. These findings can be readily verified in experiment, and can greatly enrich the topological phases in bosonic and classical systems.

Date: 2016
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DOI: 10.1038/ncomms13486

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