Reflection anisotropy spectroscopy and reflection high-energy electron diffraction techniques were used to study clean (001) surfaces which had been prepared by means of molecular beam epitaxy. The (2 x 4), (2 x 1), (2 x 2) and c(4 x 4) reflection high-energy electron diffraction patterns were observed at P beam equivalent pressures of between 3.5 x 10-7 and 3.5 x 10-6mbar, and substrate temperatures ranging from 590 to 150C. The main reflection anisotropy spectroscopic features, observed at 1.7 to 1.9 and 2.6 to 2.9eV, were attributed to In and P dimers, respectively. The above reconstruction sequence was closely associated with transformations that were induced by progressively increasing the P surface coverage. The reflection anisotropy spectroscopy results also implied the existence of (2 x 4)α and (2 x 4)β phases. A surface phase diagram was proposed, for the present material and surface, which covered the entire range of substrate temperatures and P beam equivalent pressures.

K.B.Ozanyan, P.J.Parbrook, M.Hopkinson, C.R.Whitehouse, Z.Sobiesierski, D.I.Westwood: Journal of Applied Physics, 1997, 82[1], 474-6