Long-range self-organization of pseudo-1D NiAl single-crystal array

We have first shown a long-range self-organization of a pseudo-one-dimensional single-crystal island array in an early epitaxial-growth stage of NiAl on (001) AlAs at 790 K. Up to the coverage θ=0.4, the dominant growth feature is an elongation along the [11¯0${]}_{\mathrm{AlAs}}$ direction with constant island height. As a result, there appears a quasiperiodic array of NiAl wires over a few micrometers long running along the [110${]}_{\mathrm{AlAs}}$ direction at θ=0.4. After that, the dominant growth behavior changes from the lateral growth to a growth in height.