3 papers
cond-mat.mtrl-sci2026
Momentum- and frequency-resolved collective electronic excitations in solids: insights from spectroscopy and first-principles calculations
Dario A. Leon, Kristian Berland
Collective electronic excitations, including plasmons, excitons, and intra- and interband transitions, play a central role in determining the dynamic screening, optical response, a…
cond-mat.mtrl-sci2025
Self-consistent layer-projected scissors operator for band structures of complex 2D van der Waals materials
Dario A. Leon, Mikael Kuisma, Mikkel Ohm Sauer +6
We introduce a computationally efficient method to calculate the quasiparticle (QP) band structure of general van der Waals (vdW) heterostructures. A layer-projected scissors (LAPS…
cond-mat.mtrl-sci2025
Spectral properties from an efficient analytical representation of the self-energy within a multipole approximation
Dario A. Leon, Kristian Berland, Claudia Cardoso
We propose an efficient analytical representation of the frequency-dependent self-energy via a multipole approximation (MPA-). The multipole-Padé model for the self-ene…