The change of the morphology of an oxide-stripped Si(001) surface prepared by HF etching is observed by scanning tunneling microscopy (STM) after sample heating in UHV. The tunneling images after heating the sample to 600°C shows a slightly undulated and disordered surface where only a trace of a (2×2) dimer row is observable. After heating to 800°C, dimer chains which run parallel to the dimer axis are formed. By heating to 1000°C, narrow plateaus grow where a p(2×2) structure with Pandey's missing dimer is realized. The reconstruction proceeds after higher-temperature heating (∼ 1200°C) to reveal the conventional (2×1) reconstructed structure.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics