Program

P.34 -- Poster, NCTP-42

Date: Tuesday, 1 August 2017

Time: 16h00 - 17h30

Interplay between disorder, magnetism and topology in topological insulators doped with magnetic impurities

Hong-Son Nguyen (1), Duc-Anh Le (2), and Minh-Tien Tran (3,4)

(1) Department of Occupational Safety and Health, Trade Union University, 169 Tay Son, Hanoi, Vietnam (2) Faculty of Physics, Hanoi National University of Education,136 Xuan Thuy, Cau Giay, Hanoi, Vietnam (3) Institute of Research and Development, Duy Tan University, K7/25 Quang Trung, Danang, Vietnam (4) Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi, Vietnam

A topological insulator doped with random magnetic impurities is studied. The system is modelled by the Kane-Mele model with a random spin exchange between itinerant electrons and magnetic impurities. The dynamical mean field theory is used to investigate the electron dynamics. Both magnetic long-range order and the Hall conductance are calculated. They reveal a rich phase diagram, where various magnetic long-range orders such as the antiferromagnetic or ferromagnetic ones can exist in the topological insulator phase, depending on the electron and magnetic impurity concentrations as well as the ratio between the spin exchange and the spin-orbit coupling.

Presenter: Nguyen Hong Son