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cond-mat.str-el2021
Random Phase Approximation for gapped systems: role of vertex corrections and applicability of the constrained random phase approximation
Erik G. C. P. van Loon, Malte Rösner, Mikhail I. Katsnelson +1
The many-body theory of interacting electrons poses an intrinsically difficult problem that requires simplifying assumptions. For the determination of electronic screening properti…
cond-mat.str-el2021
Downfolding approaches to electron-ion coupling: Constrained density-functional perturbation theory for molecules
Erik G. C. P. van Loon, Jan Berges, Tim O. Wehling
Constrained electronic-structure theories enable the construction of effective low-energy models consisting of partially dressed particles. However, the interpretation and physical…