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Delta-Doping in strained (Si) / (Ge) superlattices
(American Physical Society, 1988)
We present a comparative study of the pseudomorphic (Si)6/(Ge)6 and -doped (Si)3(Sb)(Si)2/(Ge)6 superlattices using the self-consistent pseudopotential method. The strained (Si)6/(Ge)6 superlattice has the lowest conduction-band ...
Tip induced localized states in scanning tunneling microscopy
(Institute of Physics Publishing Ltd., 1988)
We have investigated the Scanning Tunneling Microscopy (STM) of graphite with varying tip-to-surface distance. Using an LCAO type approach we showed that at small separations states are localized between the tip and the ...