Abstract
The authors report new surface reconstructions that are produced when Bi is adsorbed on Si(110) surfaces held at high substrate temperatures. At 600 °C and a Bi coverage of 0.1 ML, reflection high energy electron diffraction (RHEED) patterns reveal the formation of a 3×″4″-Bi structure with b1 = 3a1 and b2=−a1+4a2. At 630 °C and 0.2 ML Bi coverage, a 3×″6″-Bi structure is observed, with b1=3a1 and b2=−a1+6a2. The coexistence of streaks and spots in the RHEED patterns of the 3×″4″ and 3×″6″ structures indicate a high density of antiphase domains, with poor structural correlation along the [001] direction. The authors propose structural models based on rows of Bi adatoms aligned along the [1¯10] direction. The models proposed can also be applied to similar reconstructions on Si(110) adsorbed with other metals.
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