[Wien] supercell minimisation

[Michael Gurnett]

I have an 8 layer Ge(111) supercell which I'm trying to minimise. One 
side is terminated with H. During minimisation is it enough to just let 
the bottom 2 layers move and the top three. I tried initially letting 
all atoms move but I've got to a point where mini just can reduce 
anymore. Was therefore thinking of starting again from the 
unreconstructed supercell.

Hope someone has some ideas

Thanks

Michael