A. Watanabe et al., HYDROGEN-INDUCED RECONSTRUCTION OF THE GAP(001) SURFACE STUDIED BY SCANNING-TUNNELING-MICROSCOPY, Journal of vacuum science & technology. B, Microelectronics and nanometer structures processing, measurement and phenomena, 14(6), 1996, pp. 3599-3602
We report results of a scanning tunneling microscopy investigation on
the reconstruction of GaP(001) surfaces. We have observed a 4x2 struct
ure, accompanied locally with c(8x2) domains, at a surface prepared by
using ion sputtering and annealing method. On the contrary, both 2x4
[with local c(2x8)] and 4x2 [with local c(8x2)] structures are obtaine
d by hydrogenation followed by annealing. The former consists of a uni
t structure of three P dimers plus one dimer vacancy, whereas the latt
er is a parallel arrangement of zig-zag-chained structures along the [
110] direction. It has been shown that the surface hydrogenation befor
e annealing induces new types of reconstruction. (C) 1996 American Vac
uum Society.