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Title:

Helium Ion Modified Luminescence and Robust Valley Polarization of Atomically Thin MoS2

Document type:
Konferenzbeitrag
Contribution type:
Vortrag / Präsentation
Author(s):
Fabian Merbeler, Julian Klein, Agnieszka-Beata Kuc, Anna Noliner, Marcus Altzschner, Jakob Wierzbowski, Florian Sigger, Franz Kreupl, Jonathan Finley, Ursula Wurstbauer, Alexander Holleitner, Michael Kaniber
Abstract:
We show a systematic study of the impact of focused helium ions on the optical, vibrational, and valleytronic properties of atomically thin MoS2. The shifting of the first-order Raman modes are explained by a phonon confinement model introducing an effective interdefect distance. We perform ab-initio density functional theory calculations on a variety of defect related morphologies to explain an additional luminescence peak by O2 molecules chemisorbed at monosulphur vacancies. We further obser...     »
Book / Congress title:
DPG Tagung
Year:
2018
TUM Institution:
Hybride Elektronische Systeme
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