DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 20: 2D semiconductors and van der Waals heterostructures II (joint session HL/DS)

HL 20.8: Vortrag

Montag, 16. März 2020, 17:30–17:45, POT 81

Theory of Exciton-Electron Coupling in Two-Dimensional Semiconductors — •Frederik Schirdewahn1, Dominik Christiansen1, Andreas Knorr1, Tommaso Venanzi2, Stephan Winnerl2, and Malte Selig11Technische Universität Berlin, Germany — 2Helmholtz Zentrum Dresden-Rossendorf, Germany

The strong Coulomb interaction in monolayers of doped transition metal dichalcogenides (TMDCs) leads to the formation of tightly bound excitons and electron gas assisted exciton transitions (trions)[1,2]. Here we present a microscopic approach within the Heisenberg equation of motion formalism for the excitonic absorption including trion signatures[3]. We discuss the impact of doping density and temperature on the absorption spectrum. Additionally we present a joint experiment theory study for THz pump VIS probe experiments of doped monolayer MoSe2, where we find a red shift of exciton and trion lines which we trace back to a heating of the electrons due to the THz pulse finding a good comparison between theory and experiment.

[1] G. Plechinger et al., Nat. Commun. 7, 12715 (2016)

[2] T. C. Berkelbach et al., Phys. Rev. B 88, 045318 (2013)

[3] A. Esser et al., phys. stat. sol. (b) 2, 317 (2001)

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden