Program

P.2 -- Poster, NCTP-41

Date: Tuesday, 2 August 2016

Time: 08h30 - 10h00

Phonon-assisted cyclotron resonance in MoS2 on polar substrates via two photon absorption process

Huynh Vinh Phuc (1), Luong Van Tung (1), Le Dinh (2), Tran Cong Phong (2,3)

(1) Dong Thap University; (2) Center for Theoretical and Computational Physics, Hue University's College of Education; (3) Vietnam Institute of Educational Sciences, 101 Tran Hung Dao, Ha Noi.

In this work, we study the influence of surface optical (SO) phonons on the phonon-assisted cyclotron resonance (PACR) effect in a monolayer MoS2 on different polar substrates via both one and two-photon absorption processes. The two-photon absorption process gives a significant contribution to magneto-optical absorption coefficient (MOAC) compared to one photon process. The shifts of the absorption peaks are larger for polar substrates than those in MoS2 on nonpolar substrates, where only the intrinsic optical phonons of MoS2 with higher energy contribute. Effects of temperature, MoS2-substrate thickness, and magnetic field on MOAC and full width at half maximum (FWHM) are discussed.

Presenter: Huỳnh Vĩnh Phúc