2016/02/19 by Ken-ichi Sasaki, Shuichi Murakami, Yasuhiro Tokura +2
Engineering · Physics and Astronomy · #Dust and Plasma Wave Phenomena #Plasmonic and Surface Plasmon Research #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.93.125402
published as Phys. Rev. B. 93, 125402 (2016) · 7 pages, 4 figures
arxiv created 2016/02/19 · openalex publication_date 2016/03/03 · arxiv updated 2016/03/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
It is known that peculiar plasmons whose frequencies are purely imaginary exist in the interior of a two-dimensional electronic system described by the Drude model. We show that when an external magnetic field is applied to the system, these bulk plasmons are still non-oscillating and are isolated from the magnetoplasmons by the energy gap of the cyclotron frequency. These are mainly in a transverse magnetic mode and can combine with a transverse electronic mode locally at an edge of the system to form edge magnetoplasmons. With this observation, we reveal the intrinsic long lifetime of edge magnetoplasmons for the first time.