Programme

I.1 -- Invited, VCTP-49

Date: Tuesday, 30 July 2024

Time: 09:20 - 10:00

Excitonic physics and potential applications in two-dimensional materials

Vo Khuong Dien (1,2)

(1) Division of Applied Physics, Dong Nai Technology University, Bien Hoa City, Vietnam (2) Faculty of Engineering, Dong Nai Technology University, Bien Hoa City, Vietnam

Due to reduced dielectric screening and enhanced Coulomb interactions, two-dimensional (2D) materials exhibit strong excitonic effects, resulting in fascinating many-particle phenomena. In our current work, we discuss the remarkably versatile excitonic landscape, including bright excitons, spin-forbidden excitons, and momentum-forbidden dark excitons, by numerically solving the Bethe-Salpeter equation (BSE). We also explore potential applications, such as valleytronics and energy harvesting, highlighting the prominent role of excitonic effects. Keyworks: excitons in 2D Materials, BSE, Valleytronics, Förster-Induced Energy Transfer. References: [1] Khuong Dien, V., Thi Bich Thao, P., Thi Han, N., Duy Khanh, N., Phuong Thuan, L.V., Lin, M.F. and Thanh Tien, N., 2023. Strain-controlled electronic transport and exciton radiative lifetime in monolayer germanium sulfide. Physical Review B, 108(20), p.205406. [2] Thanh Tien, N., Thi Bich Thao, P., Thi Han, N. and Khuong Dien, V., 2024. Symmetry-driven valleytronics in the single-layer tin chalcogenides SnS and SnSe. Physical Review B, 109(15), p.155416.

Presenter: Vo Khuong Dien