Multiple Magnesium Donor Impurities in Silicon
Abstract
It is well known that the group-II magnesium, when diffused into silicon, enters the silicon lattice interstitially and behaves as a helium-like double donor. The ionization energy determined from the excitation spectrum measured at liquid helium temperature is 107.50 meV for neutral magnesium donor. Several additional spectral lines have been observed from high-resolution FT-IR absorption spectrum measured at low temperature. Comparison of line spacings and relative intensities of these additional spectral lines and those observed for neutral magnesium donor suggests that they are due to several shallower donor impurities. This clearly indicates that there are multiple neutral donor centers for interstitial magnesium impurities in silicon.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MAR.K1017H