Beyond the random phase approximation: Improved description of short-range correlation by a renormalized adiabatic local density approximation

Beyond the random phase approximation Improved description of short-range correlation by a renormalized adiabatic local density approximation

Extending the random-phase approximation for electronic correlation energies: the renormalized adiabatic local density approximation

Short-range exchange and correlation energy density functionals: beyond the local-density approximation.

We propose approximations which go beyond the local-density approximation for the short-range exchange and correlation density functionals appearing in a multideterminantal extension of the Kohn-Sham scheme. A first approximation consists of defining locally the range of the interaction in the correlation functional. Another approximation, more conventional, is based on a gradient expansion of ...

Density functional theory beyond the linear regime: Validating an adiabatic local density approximation

N. Helbig,1 J. I. Fuks,1 M. Casula,2 M. J. Verstraete,3,4 M. A. L. Marques,5,4 I. V. Tokatly,1,6 and A. Rubio1,7 1Nano-Bio Spectroscopy Group and ETSF Scientific Development Centre, Departamento Fı́sica de Materiales, Universidad del Paı́s Vasco, CFM CSIC-UPV/EHU-MPC and DIPC, Avenida Tolosa 72, E-20018 San Sebastián, Spain 2CNRS and Institut de Minéralogie et de Physique des Milieux Condensés, c...

Electron Liquid Beyond the Random Phase Approximation

A deeper understanding of low-dimensional and small-scale electronic systems requires an accurate characterization of the many-electron effects. Based on the electron liquid (EL) model, these many-body effects in the three-dimensional (3D) and two-dimensional (2D) electronic systems are dealt going beyond the random phase approximation within the zero-temperature framework. The dielectric formu...