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

HL: Fachverband Halbleiterphysik

HL 8: 2D Materials II (joint session HL/CPP)

HL 8.4: Vortrag

Montag, 27. März 2023, 15:45–16:00, POT 81

Coherence of interlayer exciton ensembles in MoSe₂/WSe₂ heterobilayers — •Christos Paspalides¹, Mirco Troue¹, Johannes Figueiredo¹, Lukas Sigl¹, Manuel Katzer², Malte Selig², Andreas Knorr², Ursula Wurstbauer³, and Alexander Holleitner¹ — ¹TU Munich — ²Technische Universität Berlin — ³University of Münster

Transition metal dichalcogenides exhibit strong light-matter interactions, which suggests them to be ideal candidates for novel 2D optoelectronic applications. Corresponding van der Waals heterostacks allow the excitation and formation of long-lived interlayer excitons [1]. We present coherence measurements of the ground state in such interlayer exciton ensembles by performing Michelson-Morley interferometry over a wide range of exciton density and temperature [2]. Moreover, we discuss the expansion dynamics of the interlayer excitons presumably driven by dipole-dipole interactions. The presented work paves the way towards a detailed understanding of excitonic many-body quantum phenomena in two-dimensional materials [3].

[1] B. Miller et al., Nano Letters 17, 5229 (2017).

[2] M. Troue and J. Figueiredo, et al (2023).

[3] L. Sigl et al., Signatures of a degenerate many-body state of interlayer excitons in a van der Waals heterostack, Phys. Rev. Res. 2, 042044 (2020).