Abstract
Considerable structure has been observed at the intrinsic optical absorption edge of annealed films of BaO, BaS, BaSe, BaTe, SrO, SrS, SrSe, and SrTe at -160°C. Photoemission measurements allow an estimate to be made of the energy separation between the top of the valence band and the vacuum level.
- Received 12 March 1958
DOI:https://doi.org/10.1103/PhysRev.111.113
©1958 American Physical Society
