TY - GEN
T1 - Electronic structure and stability of ferromagnetic GaN doped with Mn
AU - Kang, Joongoo
AU - Chang, Kee Joo
AU - Katayama-Yoshida, H.
PY - 2005/6/30
Y1 - 2005/6/30
N2 - Based on the first-principles spin-density functional calculations, we investigate the magnetic interactions between Mn ions in Mn-doped GaN. We find that the ferromagnetic coupling has a short-range nature, effective for Mn-Mn distances up to about 7 Å. For Mn concentrations of about 6%, the ferromagnetic solution is more stable than the antiferromagnetic state, while the ferromagnetic stability is weakened by electron doping. Using the calculated exchange coupling and the percolation approach, we estimate the Curie temperature lying above room temperature. Analyzing the Mn d levels, we suggest that the d-d hybridization between Mn ions is the main reason for stabilizing the ferromagnetic state.
AB - Based on the first-principles spin-density functional calculations, we investigate the magnetic interactions between Mn ions in Mn-doped GaN. We find that the ferromagnetic coupling has a short-range nature, effective for Mn-Mn distances up to about 7 Å. For Mn concentrations of about 6%, the ferromagnetic solution is more stable than the antiferromagnetic state, while the ferromagnetic stability is weakened by electron doping. Using the calculated exchange coupling and the percolation approach, we estimate the Curie temperature lying above room temperature. Analyzing the Mn d levels, we suggest that the d-d hybridization between Mn ions is the main reason for stabilizing the ferromagnetic state.
UR - https://www.scopus.com/pages/publications/33749474008
U2 - 10.1063/1.1994115
DO - 10.1063/1.1994115
M3 - Conference contribution
AN - SCOPUS:33749474008
SN - 0735402574
SN - 9780735402577
T3 - AIP Conference Proceedings
SP - 315
EP - 316
BT - PHYSICS OF SEMICONDUCTORS
T2 - PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27
Y2 - 26 July 2004 through 30 July 2004
ER -