Low-frequency electrostatic wave in a metallic electron-hole-ion plasma with nanoparticles

Abstract

Abstract. We investigate the dispersion property of a low-frequency electrostatic wave in a dense metallic electron-hole-ion plasma with nanoparticles. The latter are charged due to the field emission, and hence the metallic nanoparticles/nanotubes can be regarded as charged dust rods surrounded by degenerate electrons and holes, and non-degenerate ions. By using a quantum hydrodynamic model for the electrons and holes, we obtain the electron and hole number density perturbations, while the ion and dust rod number density perturbations follow the classical expressions. A dispersion relation for the low-frequency electrostatic wave in our multispecies dense metallic plasma is derived and analyzed. The possibility of exciting non-thermal electrostatic waves is also discussed.Carbon nanotubes [1] were discovered around 18 years ago. Since then there have been a great deal of experimental [2,3] and theoretical [4,5,[7][8][9][10] investigations of localized collective electronic excitations (plasmon modes) in single-and multiwalled carbon nanotubes (CNTs). The knowledge of dispersion properties of numerous plasmonic modes is essential for determining the parameters that control electronic structures of CNTs.The CNTs can be metallic or semiconducting depending on their radius and the geometric angles. When CNTs are held in plasmas, one encounters charging of CNTs due to the electric field emission [11,12]. Henceforth, CNTs in a dense metallic plasma can be regarded as an ensemble of charged nanoparticles surrounded by degenerate electrons and holes, as well as non-degenerate ions. Collective interactions between the plasma and charged nanoparticles can give rise to new wave modes in a multi-species dense metallic plasma.In this letter, we report on the existence of a low-frequency electrostatic wave and its instability in a metallic plasma. The latter is composed of degenerate electrons https://www.cambridge.org/core/terms. https://doi