Investigation of optoelectronic properties of pure and Co substituted
α
-Al
2
O
3
by Hubbard and modified Becke–Johnson exchange potentials
Rahnamaye Aliabad H. A.†
Calculated band structures for α -Al
1.833
Co
0.167
O
3
with (a) GGA, (b) GGA + U , and (c) mBJ.