104 citations · 1.3k across the 61 of their papers we have counts for
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Role of Coulomb interaction in the superconducting properties of CaC6 and H under pressure
S. Massidda, F. Bernardini, C. Bersier +10
Superconductivity in intercalated graphite CaC6 and H under extreme pressure, in the framework of superconducting density functional theory, is discussed. A detailed analysis on ho…
Density gradients for the exchange energy of electrons in two dimensions
S. Pittalis, E. Rasanen, J. G. Vilhena +1
We derive a generalized gradient approximation to the exchange energy to be used in density functional theory calculations of two-dimensional systems. This class of approximations…
Correlation energy of two-dimensional systems: Toward non-empirical and universal modeling
S. Pittalis, E. Rasanen, C. Proetto +1
The capability of density-functional theory to deal with the ground-state of strongly correlated low-dimensional systems, such as semiconductor quantum dots, depends on the accurac…
Electronic exchange in quantum rings
E. Rasanen, S. Pittalis, C. R. Proetto +1
Quantum rings can be characterized by a specific radius and ring width. For this rich class of physical systems, an accurate approximation for the exchange-hole potential and thus…
Local correlation functional for electrons in two dimensions
S. Pittalis, E. Rasanen, M. Marques
We derive a local approximation for the correlation energy in two-dimensional electronic systems. In the derivation we follow the scheme originally developed by Colle and Salvetti…