2022/02/16 by Dinh Van Tuan, Van Tuan, Dinh, Hanan Dery +1
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #2D Materials and Applications #Advanced biosensing and bioanalysis techniques #FOS: Physical sciences #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.2202.08379
openalex publication_date 2022/02/16 · arxiv created 2022/02/20 · arxiv updated 2022/02/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a comprehensive theoretical analysis of composite excitonic states in doped transition-metal dichalcogenide monolayers. Making use of the pair distribution function, we introduce a method to include the effect of screening in the interaction between the excitonic state and Fermi-sea electrons. Employing the screened potential, we study tetrons and pexcitons in which a trion is bound to one and two holes in the conduction band, respectively. A conduction-band hole denotes the lack of electrons with certain quantum numbers at the vicinity of the trion. We then analyze the hexciton complex wherein conduction-band holes facilitate binding of three electrons with one valence-band hole. We introduce a simple model from which one can readily calculate the binding energy of the third (satellite) electron in the hexciton complex. Finally, we compare the simulated results with experiment and point out the shortcomings and successes of the analysis.