Polarization-dependent grazing incidence EXAFS, employing the electron
yield technique, has been used to study the local atomic structure of
two different short-period ZnTe/CdSe (001) superlattices grown by MBE
. This data indicate Zn-Se and Cd-Te coordination numbers greater than
those expected for sharp interfaces in the superlattice. Although str
ain would appear to suppress interdiffusion, we show that the results
are consistent with an interchange of Zn and Cd atoms across the Zn-Se
interface, and Se and Te atoms across the Cd-Te interface. We discuss
accommodation of this increased strain through bond bending and bond
stretching. We also discuss other experiments in progress to more full
y understand these interfaces.