Coexistence of large- and small-radius excitons bound on defects in solids
Fel'dbakh E. Kh. , Lushchik Ch. B. , Kuusmann I. L
The coexistence of largeand small-radius excitons bound with defects (Ca2+)— the impurity analog of the coexistence of free and self-trapped excitons in crystals—was detected for the first time in MgO—Ca crystals at 5 K.