I measured a grazing exit (113) RSM of Ge sample grown on silicon substrate. The RSM was drew using a JV contour software. Now I was trying to add a relaxation line on it. Firstly, I calculated the reciprocal space coordinates: Qx and Qz of Si and Ge, using the following equations:
Qx=2π/λ（cos(w)-cos(2theta-w)); Qz=2π/λ（sin(w)+sin(2theta-w)).
where, λ=1.54056 Å
But i got the coordinates cannot match with those shown on the RSM.
Take Si coordinates as an example.
For grazing exit situation, the corresponding w and 2theta angle are 53.2994 and 56.12 respectively.
The calculated qx and qz value are -0.18461 and 1.724236.
This is obviously mismatch with the obtained Si coordinates shown on the RSM.
So what is the problem there?
More Yuanyuan Wu's questions See All
Similar questions and discussions