Density functional Helium 8 Adsorption 6 Alkali metals 4 Density functional theory 4 Pair correlation 4 Superfluid helium 4 Atmospheric temperature 2 Binding energy 2 Capillarity 2 Cluster structures 2 Crystal atomic structure 2 Curved substrates 2 Cylinders (shapes) 2 Cylindrical pores 2 Cylindrical surface 2 Density functionals 2 Dissociation energies 2 Electronic structure 2 Energy functions 2 Euler-Lagrange (EL) equations 2 Film spread 2 Finite temperatures 2 Forecasting 2 Fragmentation channels 2 Ground state 2 Helium droplets 2 Helium nanosystems 2 Highest occupied molecular orbitals 2 Hydrogen 2