The DFT+$\Sigma_2$ method for electron correlation effects at transition metal surfaces

Andrea Droghetti‡,1, ∗ Miloš M. Radonjić‡,2 Anita Halder, Ivan Rungger, and Liviu Chioncel School of Physics and CRANN, Trinity College, Dublin 2, Ireland Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, and Augsburg Center for Innovative Technologies, University of Augsburg, 86135 Augsburg, Germany