Carrier concentration 30 Electron density measurement 28 Electronic density of states 26 Electrons 17 Electron temperature 12 Mathematical models 12 Molecular dynamics 12 Ionosphere 10 electron density 10 Atmospheric pressure 9 Chemical bonds 9 Electron densities 9 Electronic structure 9 Ions 9 Poisson equation 9 Topology 9 Approximation theory 8 Cassini 8 Electron density 8 Molecular systems 8 Phase transitions 8 Probes 8 Electronic density 7 Plasma jets 7 Atomic physics 6 Atoms 6 Band structure 6 Calculations 6 Ionization 6 Ionospheric electron densities 6