平面应力对氧化亚铜晶体四个激子线系的影响

于85℃烧焊在普通玻璃上的氧化亚铜晶体样品,在77°K时受到每平方毫米10多公斤的平面压缩应力。我们系统地研究了平面应力分别垂直晶体C₄,C₃和C₂对称轴的若干样品的青和蓝激子线系的强反射线的分裂与强度。如果用Γpoee等人的假定,认为这些线系是与Γ₇⁺-Γ₈^-和Γ₈⁺-Γ₈^-带边跃迁相关,则现有的实验事实可以满意地加以解释。同样应力对这种晶体的黄和绿类氢激子线系的影响也作了研究,关于平面应力各垂直C₄,C₃和C₂对称轴的诸情形,这些系中各线的位移已被测定,其结果指示绿系的里德伯常数和线系极限受平面应力的影响比黄系的大得多。

THE EFFECTS OF PLANE STRESS ON FOUR EXCITON LINE SERIES IN CUPROUS OXIDE CRYSTAL

At about 850℃ on common glass welded cuprous oxide crystal sample is under more than 10kg/mm² plane compressive stress at 77°K. We have investigated systematically the splittings and intensities of the strong reflection lines of the pale-blue and blue exciton line series in some samples with plane stress perpendicular to C₄, C₃, and C₂ symmetry axes of the crystal respectively. If it is assumed, as by E. F. Gross and colleagues, that these series are relative to Γ₇⁺-Γ₈^- and Γ₈⁺-Γ₈^- band edge transitions, the present experimental facts can be interpreted satisfactorilly. The effects of the same stress on the yellow and green hydrogenic exciton line series of this crystal are investigated also. For the cases of plane stress perpendicular to C₄, C₃, and C₂ symmetry axes respectively, the shift of each line of these series are determined, the results show that the effect of the stress on the Rydberg constant and the series limit of the green series is large than that of the yellow series.