Excited Biexcitons in Transition Metal Dichalcogenides

• Published in: Nano letters Vol. 15; no. 10; pp. 7002 - 7005
• Main Authors: Zhang, David K, Kidd, Daniel W, Varga, Kálmán
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 14.10.2015
• Subjects: Binding energy; Chalcogens - chemistry; Excitation; Excitons; Mathematical models; Stochasticity; Transition Elements - chemistry; Transition metals; Trions; Variational methods; stochastic variational method; two-dimensional materials; transition metal dichalcogenides; excited states; binding energy; biexciton

The Stochastic Variational Method (SVM) is used to show that the effective mass model correctly estimates the binding energies of excitons and trions but fails to predict the experimental binding energy of the biexciton. Using high-accuracy variational calculations, it is demonstrated that the biexc...