Programme

P.15 -- Poster, VCTP-49

Date: Wednesday, 31 July 2024

Time: 08:30 - 10:00

Double exchange mechanism in topological insulators

Nguyen Hong Son (1), Phan Van Nham (2), Vu Thi Kim Oanh (3), Tran Minh Tien (3)

(1) Trade Union University, 169 Tay Son, Hanoi, Vietnam (2) Institute of Research and Development, Duy Tan University, Danang, Vietnam (3) Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, Vietnam

Double exchange mechanism in topological insulators is studied. The topological insulator is modeled by the Kane-Model model. A dynamical mean field theory in a rotated spin basis is constructed. It is suitable for studying different magnetization configurations, which can be non-collinear, in and out of plane. Edge states are investigated by considering a zigzag nanoribbon of the honeycomb lattice. They reveal both the edge magnetization and helicity. It is found that the in-plane antiferromagnetism is favor, but topologically trivial. The local magnetization slightly varies, but is enhanced at the edges.

Presenter: Nguyen Hong-Son