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Doping fingerprints of spin and lattice fluctuations in moiré superlattice systems
Niklas Witt, José M. Pizarro, Jan Berges +3
Twisted Van der Waals systems offer the unprecedented possibility to tune different states of correlated quantum matter with an external non-invasive electrostatic doping. The natu…
Downfolding the Su-Schrieffer-Heeger model
Arne Schobert, Jan Berges, Tim Wehling +1
Charge-density waves are responsible for symmetry-breaking displacements of atoms and concomitant changes in the electronic structure. Linear response theories, in particular densi…
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…
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…
A full gap above the Fermi level: the charge density wave of monolayer VS2
Camiel van Efferen, Jan Berges, Joshua Hall +15
In the standard model of charge density wave (CDW) transitions, the displacement along a single phonon mode lowers the total electronic energy by creating a gap at the Fermi level,…