STRUCTURAL, COMPOSITIONAL, AND OPTICAL PROPERTIES OF ULTRATHIN Si/Ge SUPERLATTICES K. EBERL, G. KRÖTZ, R. ZACHAI et G. ABSTREITER J. Phys. Colloques, 48 C5 (1987) C5-329-C5-332 DOI: 10.1051/jphyscol:1987570