3D hydrogen-like screening effect on excitons in hBN-encapsulated monolayer transition metal dichalcogenides

S Takahashi, S Kusaba, K Watanabe, T Taniguchi… - Scientific Reports, 2024 - nature.com
We observe both s-series and p-series excitons by using sum frequency generation
spectroscopy on monolayer (1L-) MX2 (M= Mo, W, X= S, Se) encapsulated by hexagonal …