Abstract
Phosphorus shallow donors having the symmetry lower than T d are studied by pulsed EPR. In diamond:P and 3 C –SiC:P, the symmetry is lowered to D 2 d and the density of the donor wave function on the phosphorus atom exhibits a predominant p-character. In 4 H –SiC:P with the site symmetry of C 3 v , the A 1 ground state of the phosphorus donors substituting at the quasi-cubic site of silicon shows an axial character of the distribution of the donor wave function in the vicinity of the phosphorus atom.
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