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Surface structures induced by the growth of Cr on Cu(111) at room temperature are studied with scanning tunneling microscopy. At sub-monolayer Cr coverage, islands and vacancy islands with lateral sizes of about 10nm in length are observed. The islands show one- or two-monolayer heights with irregular shapes, while vacancy islands have one-monolayer depth and hexagonal shapes with openings. Atomic...
The surface atomic structure of Bi on Au(111) is studied with scanning tunneling microscopy. At about 0.5 monolayer of Bi, a well-ordered 6×6 atomic structure is observed. The structure has three notable features: corner holes, Bi adatoms, and stacking faults, very similar to a semiconductor surface of Si(111)-7×7. Out of 18 Bi surface atoms in a unit cell, six atoms are at hollow sites and are adatoms,...
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