Thermal Activation of Valley-Orbit States of Neutral Magnesium in Silicon

Interstitial magnesium acts as a moderately deep double donor in silicon, and is relatively easily introduced by diffusion. Unlike the case of chalcogen donors, parameters even-parity valley-orbit excited states 1s(T 2 ) 1s(E) have remained elusive. Here we report on further study these neutral through temperature dependence absorption measurements. The results demonstrate thermal activation from ground state 1s(A 1 to states, observed transitions thermally populated levels odd-parity 2p 0 ± . Analysis data makes it possible determine energies levels, well binding an electron with states. Keywords: impurity center, optical spectroscopy.