Si Ge structure

Fig. 14.7 A2EuM See (A=Na, K, Rb, Cs M=Si, Ge) structures. In all structures, the alkali metals are black spheres, Se light spheres, EuSe polyhedra are light grey and M2S06 polyhedra are dark grey.

Figure 7.5 (a) Double-crystal rocking curve of the five-layer Si-Ge structure, (b) Tripleaxis -2 longitudinal scan of the same structure, (c) Specimen only (rocking curve) scan with the analyser set on the left-hand peak in the triple-axis curve. 004 reflection with CuK, single-reflection Ge analyser for (b) and (c)... 

The first experimental realization of intersubband lasers without inversion exploited the nonparabolicity of the conduction subbands and local population inversion near k=0 even though the lowest subband may have larger global occupation [25]. Later on, valence-band-based designs have been proposed [26-28], Intervalence band emitters based on Si-Ge structures have been... 

Support = silica, alumina, boric acid R = alkyl, aryl X = halogen M = Si, Ge Structure depicts simplified representation of MAO. 

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