2016/02/04 by Julian Klein, Jakob Wierzbowski, Armin Regler +6 · 107 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Atomic physics #Biexciton #Chemistry #Condensed matter physics #Electric field #Exciton #Layer (electronics) #MXene and MAX Phase Materials #Materials science #Molecular physics #Molecule #Nanotechnology #Optoelectronics #Perovskite Materials and Applications #Photoluminescence #Physics #Polarizability #Spectroscopy #Stark effect #cond-mat.mes-hall
paper · pdf · doi:10.1021/acs.nanolett.5b03954
published in Nano Letters 16(3), 1554-1559 (American Chemical Society) · 19 pages, 4 figures in Nano Lett. 2016
openalex publication_date 2016/02/04 · arxiv created 2016/02/05 · openalex created_date 2016/06/24 · arxiv updated 2017/01/10 · openalex updated_date 2026/08/05
We demonstrate electrical control of the A-exciton interband transition in mono- and few-layer MoS2 crystals embedded into photocapacitor devices via the DC Stark effect. Electric field-dependent low-temperature photoluminescence spectroscopy reveals a significant tuneability of the A-exciton transition energy up to ∼ 16 meV from which we extract the mean DC exciton polarizability ⟨β̅N⟩ = (0.58 ± 0.25) × 10(-8) Dm V(-1). The exciton polarizability is shown to be layer-independent, indicating a strong localization of both electron and hole wave functions in each individual layer.