Emergent trion-phonon coupling in atomically reconstructed MoSe_{2}-WSe_{2} heterobilayers

In low-temperature resonant Raman experiments on MoSe_{2}-WSe_{2} heterobilayers, we identify a hybrid interlayer shear mode (HSM) with an energy close to the interlayer shear mode (SM) of the heterobilayers, but with a much broader, asymmetric lineshape. The HSM shows a pronounced resonance with th...

Full description

Saved in:
Bibliographic Details
Published in:Physical review research 2023-09, Vol.5 (3), p.L032036
Main Authors: Sebastian Meier, Yaroslav Zhumagulov, Matthias Dietl, Philipp Parzefall, Michael Kempf, Johannes Holler, Philipp Nagler, Paulo E. Faria Junior, Jaroslav Fabian, Tobias Korn, Christian Schüller
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In low-temperature resonant Raman experiments on MoSe_{2}-WSe_{2} heterobilayers, we identify a hybrid interlayer shear mode (HSM) with an energy close to the interlayer shear mode (SM) of the heterobilayers, but with a much broader, asymmetric lineshape. The HSM shows a pronounced resonance with the intralayer hybrid trions (HX^{−}) of the MoSe_{2} and WSe_{2} layers only. No resonance with the neutral intralayer excitons is found. First-principles calculations reveal a strong coupling of Q-valley states, which are delocalized over both layers and participate in the HX^{−} with the SM. This emerging trion-phonon coupling may be relevant for experiments on gate-controlled heterobilayers.
ISSN:2643-1564
DOI:10.1103/PhysRevResearch.5.L032036