Programme

P.76 -- Posters, VCTP-50

Date: Thursday, 7 August 2025

Time: 08:30 - 10:00

Analytical method: Universal formula for obtaining fundamental material parameters of monolayer transition metal dichalcogenides from experimental exciton energies

Le Hoang Viet(1), Le Do Dang Khoa(1), Le Van Hoang (1)

(1) Computational Physics Key Laboratory K002, Department of Physics, Ho Chi Minh City University of Education, Ho Chi Minh City 72759, Vietnam

Monolayer transition metal dichalcogenides (TMDCs) have attracted much research attention because their high binding energies. Exciton, excited bound electron-hole pairs, have been found and studied in this material. Experiments show that the exciton binding energy strongly depends on material parameters such as: reduced exciton mass, polarizability, and dielectric constant of the surrounding medium. This suggests to us a method to extract information about materials from their experimental energy spectra. Based on the analytical expressions already developed for this type of material with a large range of material parameters, we construct a universal formula to extract material parameters straightforward and highly accurate from experimental energy spectra. By applying this method, we extract material parameters Eg, r0, µ, and κ from the magnetoexciton energies of monolayer TMDCs encapsulated by different in various current experiments

Presenter: Lê Hoàng Việt