Abstract
A scanning tunneling microscopy (STM) study of the α-Sn/Ge(111) at low temperature is presented. The scanning tunneling spectroscopy (STS) measurements of the surface evidenced a metallic character from the room temperature down to the 3×3 transition temperature. The fluctuation model for the √3×√3 reconstruction is confirmed by dynamical measurements of the tunneling current on top the Sn adatoms. The STM tip was used as a probe to verify the presence of oscillating Sn adatoms by studying the tunneling current as a function of time.
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