Coulomb excitations of monolayer germanene

The feature-rich electronic excitations of monolayer germanene lie in the significant spin-orbit coupling and the buckled structure. The collective and single-particle excitations are diversified by the magnitude and direction of transferred momentum, the Fermi energy and the gate voltage. There are...

Full description

Saved in:
Bibliographic Details
Published inScientific reports Vol. 7; no. 1; p. 40600
Main Authors Shih, Po-Hsin, Chiu, Yu-Huang, Wu, Jhao-Ying, Shyu, Feng-Lin, Lin, Ming-Fa
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 16.01.2017
Subjects
Acoustics
Energy
Graphene
Physics
Semiconductors
Spectrum analysis
Online AccessGet full text

Cover

More Information
Summary:The feature-rich electronic excitations of monolayer germanene lie in the significant spin-orbit coupling and the buckled structure. The collective and single-particle excitations are diversified by the magnitude and direction of transferred momentum, the Fermi energy and the gate voltage. There are four kinds of plasmon modes, according to the unique frequency- and momentum-dependent phase diagrams. They behave as two-dimensional acoustic modes at long wavelength. However, for the larger momenta, they might change into another kind of undamped plasmons, become the seriously suppressed modes in the heavy intraband e-h excitations, keep the same undamped plasmons, or decline and then vanish in the strong interband e-h excitations. Germanene, silicene and graphene are quite different from one another in the main features of the diverse plasmon modes.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2045-2322
2045-2322
DOI:10.1038/srep40600