158 citations · 777 across the 35 of their papers we have counts for
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Assignment of excitonic insulators in \textit{ab initio} theories: the case of NiBr
Stefano Di Sabatino, Alejandro Molina-Sánchez, Pina Romaniello +1
In this work we perform a detailed first-principles analysis of the electronic and optical properties of NiBr within the state-of-the-art +BSE scheme to determine whether t…
Optical spectra of 2D monolayers from time-dependent density functional theory
Stefano Di Sabatino, J. A. Berger, Pina Romaniello
The optical spectra of two-dimensional (2D) periodic systems provide a challenge for time-dependent density-functional theory (TDDFT) because of the large excitonic effects in thes…
Accurate optical spectra of solids from pure time-dependent density-functional theory
Sarah Cavo, J. A. Berger, Pina Romaniello
We present accurate optical spectra of semiconductors and insulators within a pure Kohn-Sham time-dependent density-functional approach. In particular, we show that the onset of th…
Optical properties of periodic systems within the current-current response framework: pitfalls and remedies
D. Sangalli, A. Berger, C. Attaccalite +2
We compare the optical absorption of extended systems using the density-density and current-current linear response functions calculated within many-body perturbation theory. The t…
Unphysical and Physical Solutions in Many-Body Theories: from Weak to Strong Correlation
Adrian Stan, Pina Romaniello, Santiago Rigamonti +2
Many-body theory is largely based on self-consistent equations that are constructed in terms of the physical quantity of interest itself, for example the density. Therefore, the ca…