The applications of electron beam electroreflectance (EBER) to Hg(1- x)Cd(x)Te (MCT) and other semiconductor systems are desired. Temperature dependences of the E1 optical gap of MCT are in agreement with the results of other researchers. For an epitaxial sample, alpha E (1)/alpha T of -(6.7 to 8.2) x .0001 eV/K has been obtained. This value is consistent with that determined by Berlouis. We find a larger thermal coefficient for epitaxial ...
The Phase I study of heterojunction III-V layers using EBER is completed. In the case of single films, the direct band gap of AlxGa 1-x As composition from the entire range x=0 to 1 is detectable. The excitonic energy levels of a wide range of AlGaAs/GaAs single quantum wells. The observed levels have been identified with respect to the simple rectangular barrier model. In HEMT studies, our EBER studies strongly ...
Experimental field emission energy distributions (FEEDs) are reported for both n- and p-type samples of low resistivity. The experimental distributions are characterized by a high intensity single peak, of energy 0.4 eV or more below the Fermi level, with a subsidiary peak of lower intensity, rising from just below the Fermi level. The larger peak drops in energy with increasing field. Experimental FEEDs are compared to those expected theoretically. It ...
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