Journal
PHYSICAL REVIEW LETTERS
Volume 91, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.91.126406
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Using the first-principles pseudopotential method, we have studied simultaneous isovalent and n-type doping in diamond. We show that Si induces fully occupied isovalent levels near the valence band maximum. The Si levels interact with N donor levels, making them much shallower. The donor transition energy level of the N+4Si defect complexes is found to be 0.09 eV below the conduction band minimum, which is the shallowest level found thus far for this system. The binding energy of the N+4Si complex is also large enough to insure its stability.
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