Title of article :
The effect of buffer layers on structural quality of Si,., Ge,.,
layers grown on Si(OO1) substrates by molecular beam epitaxy
Author/Authors :
T. Obata a3، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1997
Abstract :
The effect of buffer layers on the structural quality of Si,,Ge,, alloy films grown on Si(OO1) substrate by molecular
beam epitaxy (MBE) have been characterized by X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS) and
cross-sectional transmission electron microscope (XTEM). It is confirmed that the threading dislocation density in the alloy
layer drastically decreases by using buffer layers. The samples with step buffer layers relax the strain by introducing the
dislocations at the interfaces, part of which goes through the alloy layer. On the other hand, the samples with superlattice
buffer layers relax the strain by introducing the dislocations in the buffer layers which terminate at the interface of the
superlattice buffer layer and the topmost alloy layer. The residual strain in the alloy layers on buffer layers grown at 550°C is
relaxed upon the annealing at 700°C or the growth at 700°C.
Keywords :
GE , SI , Buffer layers , Residual strain , Dislocation , XTEM
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science