New aspects of collective phenomena at nanoscales in quantum plasmas

Abstract

We present two novel collective effects is quantum plasmas. First, we discuss novel attractive force between ions that are shielded by the degenerate electrons in quantum plasmas. Here we show that the electric potential around an isolated ion has a hard core negative part that resembles the Lennard-Jones (LJ)-type potential. Second, we present theory for stimulated scattering instabilities of electromagnetic waves off quantum plasma modes. Our studies are based on the quantum hydrodynamical description of degenerate electrons that are greatly influenced by electromagnetic and quantum forces. The relevance of our investigation to bringing ions closer for fusion in high-energy solid density plasmas at atomic dimensions, and for producing coherent short wavelength radiation in the x-ray regime at nanoscales are discussed.