More Research Highlights
Proximity-Enhanced Valley Zeeman Splitting at the WS2/Graphene Interface
Based on first-principles calculations, we characterized proximity effects occurring at the interfaces between the van-der-Waals material?WS2 and graphene. We fitted the obtained bandstructures to an analytical model Hamiltonian and extracted the g-factors of the bilayer, suggesting a clear enhancement of the valley Zeeman effect due to proximity.
This work has been published in 2D Materials.
Signatures of Electric Field and Layer Separation Effects on the Spin-Valley Physics of MoSe2/WSe2 Heterobilayers: From Energy Bands to Dipolar Excitons
We explored the effects of electric fields and the separation of individual layers on the spin-valley physics of van-der-Waals?MoSe2/WSe2 heterobilayers using advanced first-principles methods. Within our recent work, we put a special focus on dipolar (interlayer) excitons – the exciton-forming electrons and holes are thereby localized in different layers –, for which multilayered van-der-Waals heterostructures provide a suitable platform to emerge.
This work has been published in Nanomaterials.
Strong Manipulation of the Valley Splitting upon Twisting and Gating in MoSe2/CrI3 and WSe2/CrI3 Van-Der-Waals Heterostructures
By means of first-principles calculations, we studied the impact of twisting and gating on the electronic properties of MoSe2/CrI3 and?WSe2/CrI3 van-der-Waals heterostructures. Fitting the ab-initio bandstructures to a well-established model Hamiltonian, we demonstrate that twisting and gating provide important control knobs to strongly tune the valley splitting.
This work has been published in