Abstract:
The effect of different chemical treatments on the properties of Au–$n$-SiGe è Al–$p$-SiGe Schottky barriers has been investigated. Etching under different conditions was used to prepare surfaces with different densities of surface states $(D_{\mathrm{ss}})$. It is shown that the barrier height in the structures under study correlates with the $D_{\mathrm{ss}}$ value and germanium content in the Si$_{1-x}$Ge$_x$ alloy.