Author/Authors :
Baur، نويسنده , , J. and Kunzer، نويسنده , , M. P. Dombrowski، نويسنده , , K.F. and Kaufmann، نويسنده , , U. and Schneider، نويسنده , , J. and Baranov، نويسنده , , P.G. and Mokhov، نويسنده , , E.N.، نويسنده ,
Abstract :
We report on the identification of optically and electrically active molybdenum impurities in commercial 6H- and 15R-SiC substrates by conventionally and optically detected magnetic resonance (ESR, ODMR) and magnetic circular dichroism (MCD) detection. Two impurity charge states, Mo4 + (4d2) and Mo3 +(4d3), are reported for both polytypes. We also observed the 3A2 → 3T2 crystal field absorptions of Mo4 + (4d2) in the 1.0–1.25 eV spectral range. Mo impurities on different inequivalent lattice sites in 6H- and 15R-SiC are resolved for the first time.
