Programme

P.12 -- Poster, VCTP-48

Date: Tuesday, 1 August 2023

Time: 08:30 - 10:00

Bilayer Honeycomb Spin Lattice with Competing Ferromagnetic and Antiferromagnetic Interactions in Transverse Field

Niem T. Nguyen(1), Giang H. Bach(1), Oanh T. K. Nguyen(2), Duy Huy Nguyen(1), Hai Phong Nguyen(1), Cong T. Bach(1)

(1) Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam (2) Electric Power University, 235 Hoang Quoc Viet, Hanoi, Vietnam

Magnetic properties of 2D materials and related van der Waals heterostructure systems are current interesting problems of science and technology [1]. Some structures like the Ising antiferromagnetic (AF) honeycomb spin CrI3 bilayer show sharp transition to the ferromagnetic (FM) state in a certain out-of-plane magnetic field.This first order magnetization process, which is important for application, is investigated in [2] using the model of two FM honeycomb AA-stacking spin layers coupling with each other by AF interaction in the out- of- plane magnetic field perpendicular to spin planes. The present report studies theoretically the thermodynamics and magnetization process of this bilayer honeycomb spin lattice structure for the transverse field case (the field is parallel to the spin plane) using the transverse Ising model (TIM) and mean field approximation (MFA). Temperature and transverse field dependence of the magnetization are calculated numerically and compared with the experiment for the typical antiferromagnet CrI3. 1. M. Gibertini et al, Nature Nanotechnology 14 (2019) 408–419. 2. Niem N. T et al, Materials Transaction, 2023. https://doi.org/10.2320/matertrans.MT-MG2022025

Presenter: Bạch Thành Công