Surface Plasmons and Topological Insulators

Details Surface Plasmons and Topological Insulators Surface Plasmons and Topological Insulators

2011-04-20

arxiv.org/abs/1104.4125v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 1 figure; v2: typo in eq. (27) corrected

Scientific paper

We study surface plasmons localized on interfaces between topologically trivial and topologically non-trivial time reversal invariant materials in three dimensions. For the interface between a metal and a topological insulator the magnetic polarization of the surface plasmon is rotated out of the plane of the interface; this effect should be experimentally observable by exciting the surface plasmon with polarized light. More interestingly, we argue that the same effect also is realized on the interface between vacuum and a doped topological insulator with non-vanishing bulk carrier density.

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