5 papers
Nature of symmetry breaking at the excitonic insulator transition: TaNiSe
Giacomo Mazza, Malte Rösner, Lukas Windgätter +5
TaNiSe is one of the most promising materials for hosting an excitonic insulator ground state. While a number of experimental observations have been interpreted in this way…
Introducing strong correlation effects into graphene by gadolinium intercalation
S. Link, S. Forti, A. Stöhr +11
Exotic ordered ground states driven by electronic correlations are expected to be induced in monolayer graphene when doped to the Van Hove singularity. Such doping levels are reach…
Rigid band shifts in two-dimensional semiconductors through environmental screening
Lutz Waldecker, Archana Raja, Malte Rösner +9
We investigate the effects of environmental dielectric screening on the electronic dispersion and the band gap in the atomically-thin, quasi two-dimensional (2D) semiconductor WS$_…
Localized Plasmons in Topological Insulators
Zhihao Jiang, Malte Rösner, Roelof E. Groenewald +1
We investigate in a fully quantum-mechanical manner how the many-body excitation spectrum of topological insulators is affected by the presence of long-range Coulomb interactions.…
Internal screening and dielectric engineering in magic-angle twisted bilayer graphene
J. M. Pizarro, M. Rösner, R. Thomale +2
Magic-angle twisted bilayer graphene (MA-tBLG) has appeared as a tunable testing ground to investigate the conspiracy of electronic interactions, band structure, and lattice degree…