Programme

P.33 -- Poster, VCTP-47

Date: Thursday, 4 August 2022

Time: 08:30 - 10:00

Ferromagnetic Magnon in Monolayer Honeycomb Spin Lattice in The Application of Transverse Field

Niem T. Nguyen(1) Giang H. Bach(1) Thao H. Pham(2), Oanh T. K. Nguyen(3), Duy Huy Nguyen (1), Cong T. Bach (1)

(1)Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam; (2)Faculty of Physics, Hue University of Education, 34 Le Loi, Hue City, Vietnam: (3)Faculty of Basis Sience, Electric University, Hanoi, Vietnam

We investigate electronic band structures of ferromagnetic magnon in the monolayer honeycomb spin lattice using the anisotropic XZ-Heisenberg model in the transverse field (TF). It is shown that the nature of this magnetic phase transition is the spin reorientation (SR) transition in the presence of TF. Besides, two magnon branches exist in the temperature region above the SR temperature. The transverse field decreases or increases the spin wave intensity in the temperature region below or above the SR temperature, respectively and the gap of the zero momentum of the lower magnon branch ε_0^- closes at the critical transverse field Ω_0C of the quantum phase transition at zero temperature. By fitting our model with the zero momentum magnon mode experimentally observed in ferromagnetic monolayer CrI3, the derived exchange parameters agree well with the DFT calculation.

Presenter: Nguyễn Từ Niệm