Cu complex in silicon and its photoluminescence

Abstract

Abstract. A recent discovery of complicated isotope shifts of PL 1014-meV line in Cu-containing silicon, which was made by Thewalt's group, indicates that existing models of Cu pair are not appropriate for the luminescence center. Our previous study shows that the most probable form of the complex is a four-membered complex Cu (s) Cu (3i) ; the symmetry is C 3v . For interpreting the complicated splitting for Γ 4 excition peak, involvement of a non-totally symmetric mode is proposed. The normal modes of this complex has been obtained by ab initio phonon calculation with explicit symmetry.

A new structure of Cu complex in Si and its photoluminescence

“…There are several Cu-related phonons with low frequency. The details of eigenvectors and their symmetry will be given in our conference proceeding [47].…”