Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/85786
Title: Fermi arc plasmons in Weyl semimetals
Authors: Song, Justin Chien Wen
Rudner, Mark S.
Keywords: Fermi Surface
Edge States
Issue Date: 2017
Source: Song, J. C. W., & Rudner, M. S. (2017). Fermi arc plasmons in Weyl semimetals. Physical Review B, 96(20), 205443-.
Series/Report no.: Physical Review B
Abstract: In the recently discovered Weyl semimetals, the Fermi surface may feature disjoint, open segments—the so-called Fermi arcs—associated with topological states bound to exposed crystal surfaces. Here we show that the collective dynamics of electrons near such surfaces sharply departs from that of a conventional three-dimensional metal. In magnetic systems with broken time reversal symmetry, the resulting Fermi arc plasmons (FAPs) are chiral, with dispersion relations featuring open, hyperbolic constant frequency contours. As a result, a large range of surface plasmon wave vectors can be supported at a given frequency, with corresponding group velocity vectors directed along a few specific collimated directions. Fermi arc plasmons can be probed using near-field photonics techniques, which may be used to launch highly directional, focused surface plasmon beams. The unusual characteristics of FAPs arise from the interplay of bulk and surface Fermi arc carrier dynamics and give a window into the unusual fermiology of Weyl semimetals.
URI: https://hdl.handle.net/10356/85786
http://hdl.handle.net/10220/45368
ISSN: 2469-9950
DOI: http://dx.doi.org/10.1103/PhysRevB.96.205443
Rights: © 2017 American Physical Society (APS). This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.96.205443]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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