Figure 1

XPS spectra for (a,d,g,j) Ga 3d, (b,e,h,k) As 3d, (c,f,i,l) Sb 3d core levels of (1st row) R, (2nd row) N-500, (3rd row) N-550, and (4th row) N-570 samples, respectively.
XPS spectra for (a,d,g,j) Ga 3d, (b,e,h,k) As 3d, (c,f,i,l) Sb 3d core levels of (1st row) R, (2nd row) N-500, (3rd row) N-550, and (4th row) N-570 samples, respectively.