52 citations · 103 across the 4 of their papers we have counts for
6 papers
Competition between excitonic charge and spin density waves: Influence of electron-phonon and Hund's rule couplings
Tatsuya Kaneko, Bernd Zenker, Holger Fehske +1
We analyze the stability of excitonic ground states in the two-band Hubbard model with additional electron-phonon and Hund's rule couplings using a combination of mean-field and va…
Excitonic Josephson effect in double-layer graphene junctions
B. Zenker, H. Fehske, H. Beck
We show that double-layer graphene (DLG), where an external potential induces an charge-imbalance between - and -type layers, is a promising candidate to realize an exciton c…
Exciton formation in strongly correlated electron-hole systems near the semimetal-semiconductor transition
B Zenker, D Ihle, F X Bronold +1
The region surrounding the excitonic insulator phase is a three-component plasma composed of electrons, holes, and excitons. Due to the extended nature of the excitons, their prese…
Fate of the excitonic insulator in the presence of phonons
B. Zenker, H. Fehske, H. Beck
The influence of phonons on the formation of the excitonic insulator has hardly been analyzed so far. Recent experiments on , 1-, and $\rm TmSe_{0.45…
Chiral charge order in 1-TiSe: importance of lattice degrees of freedom
B. Zenker, H. Fehske, H. Beck +2
We address the question of the origin of the recently discovered chiral property of the charge-density-wave phase in 1-TiSe which so far lacks a microscopic understanding. W…
Electron-hole pair condensation at the semimetal-semiconductor transition: a BCS-BEC crossover scenario
B. Zenker, D. Ihle, F. X. Bronold +1
We act on the suggestion that an excitonic insulator state might separate---at very low temperatures---a semimetal from a semiconductor and ask for the nature of these transitions.…