H. Sirringhaus et al., IN-SITU STUDY OF EPITAXIAL COSI2 SI(111) BY BALLISTIC-ELECTRON-EMISSION MICROSCOPY/, Journal of vacuum science & technology. B, Microelectronics and nanometer structures processing, measurement and phenomena, 12(4), 1994, pp. 2629-2633
We have performed in situ ballistic-electron-emission microscopy (BEEM
) and spectroscopy (BEES) at 77 K on epitaxial CoSi2/Si(111) films gro
wn by molecular bearn epitaxy. The transport in the silicide was found
to be essentially ballistic. With the help of atomic-resolution scann
ing tunneling microscopy it has been found that the BEEM current depen
ds significantly on the surface electronic structure. On strain-relaxe
d layers, hot electron scattering at individual interfacial dislocatio
ns has been observed for the first time by BEEM. Apart from the surfac
e- and dislocation-induced contrast variations, the BEEM current is ge
nerally homogeneous.