electron density 4 ionosphere 3 - 2 electron density functional method 2 graphene 2 pseudopotential method 2 графен 2 метод псевдопотенцiалу 2 метод функцiонала електронної густини 2 іоносфера 2 1 CII region 1 Davis–Mott approximation 1 Doppler frequency shift 1 Doppler sounding at oblique incidence 1 Doppler spectrum 1 Kubo–Greenwood formula 1 Sun 1 ab initio pseudopotential 1 activation 1 amorphous semiconductors 1 atmospheric gravity wave 1 decameter radio emission 1 defect absorption coefficient 1 distribution of electron density of states 1 diurnal and seasonal dependence 1 electron density distribution 1 electron density functiona 1 electron density functional 1 electron density profile 1