Programme

P.26 -- Posters, VCTP-50

Date: Tuesday, 5 August 2025

Time: 08:30 - 10:00

Half-metal state in honeycomb lattice with defects

Nguyen Hong Son (1) and Tran Minh Tien (2)

(1)Trade Union University, 169 Tay Son, Hanoi, Vietnam (2) Institute of Physics, Vietnam Academy of Science and Technology, Hanoi 10072, Vietnam

A theoretical model for graphene-like structures with regular atom doping is studied. The model is based on the Hubbard model on a honeycomb lattice with regular defects. An iterative perturbation approximation is employed to investigate both the electronic and magnetic structures. It is found that a half-metal state may be realized when electrons at the defect sites can hop to surrounding sites and the bare energy levels of two honeycomb sublattices are different. When the defects are isolated, the ground state is ferrimagnetic and opens an energy gap. A possibility of relating to graphitic carbon nitride materials is also discussed.

Presenter: Nguyen Hong-Son