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Electron Energy Loss Function of Silicene and Germanene Multilayers on Silver

Published

Author(s)

Anna L. Rast, Vinod K. Tewary

Abstract

We calculate electron energy loss spectra (EELS) for composite plasmonic structures based on silicene and germanene. A continued-fraction expression for the effective dielectric function is used to perform multiscale calculations of EELS for both silicene and germanene-based structures on silver substrates. A distinctive change in plasmonic response occurs for structures with a germanene or silicene surface coating of more than three layers. These differences may be exploited using spectroscopic characterization in order to determine if a few-layer coating has been successfully fabricated.
Citation
Physical Review B

Keywords

plasmonics, electron energy loss spectroscopy, silicene, germanene, 2D materials
Created November 4, 2013, Updated February 19, 2017