@article{1918,
abstract = {As the nuclear charge Z is continuously decreased an N-electron atom undergoes a binding-unbinding transition. We investigate whether the electrons remain bound and whether the radius of the system stays finite as the critical value Zc is approached. Existence of a ground state at Zc is shown under the condition Zc < N-K, where K is the maximal number of electrons that can be removed at Zc without changing the energy.},
author = {Bellazzini, Jacopo and Frank, Rupert and Lieb, Élliott and Seiringer, Robert},
journal = {Reviews in Mathematical Physics},
number = {1},
publisher = {World Scientific Publishing},
title = {{Existence of ground states for negative ions at the binding threshold}},
doi = {10.1142/S0129055X13500219},
volume = {26},
year = {2014},
}