Abstract
We present a high energy-resolution photoemission study of the growth morphology and electronic properties of α-Sn prepared on InSb(100). α-Sn(100) pseudomorphic growth proceeds in a layer-by-layer mode on the InSb(100)-c(8×2) reconstructed substrate. From 4 monolayer coverage up to about 200 monolayers, a well-ordered two-domain (2×1) reconstruction of the α-Sn surface has been observed. The corresponding valence band shows a non-metallic character. Valence band photoemission results also are discussed in comparison with calculated surface density of states. The surface-induced states at the α-Sn(100)-(2×1) surface are tentatively attributed to the theoretically predicted formation of asymmetric SnSn dimers on the surface.
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