title: Many-body effects and excitonic features in 2D biphenylene carbon.
abstract: The remarkable excitonic effects in low dimensional materials in connection to large binding energies of excitons are of great importance for research and technological applications such as in solar energy and quantum information processing as well as for fundamental investigations. In this study, the unique electronic and excitonic properties of the two dimensional carbon network biphenylene carbon were investigated with GW approach and the Bethe-Salpeter equation accounting for electron correlation effects and electron-hole interactions, respectively. Biphenylene carbon exhibits characteristic features including bright and dark excitons populating the optical gap of 0.52 eV and exciton binding energies of 530 meV as well as a technologically relevant intrinsic band gap of 1.05 eV. Biphenylene carbon's excitonic features, possibly tuned, suggest possible applications in the field of solar energy and quantum information technology in the future.
authors.affiliation: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden.
authors.forename: Johann
authors.initials: J
authors.lastname: Lüder
authors.affiliation: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden.
authors.forename: Carla
authors.initials: C
authors.lastname: Puglia
authors.affiliation: Department of Chemistry-BMC, Uppsala University, P.O. Box 576, 751 23 Uppsala, Sweden.
authors.forename: Henrik
authors.initials: H
authors.lastname: Ottosson
authors.affiliation: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden.
authors.forename: Olle
authors.initials: O
authors.lastname: Eriksson
authors.affiliation: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden.
authors.forename: Biplab
authors.initials: B
authors.lastname: Sanyal
authors.affiliation: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden.
authors.forename: Barbara
authors.initials: B
authors.lastname: Brena