Structure of quantum wires in Au/Si(557).
نویسندگان
چکیده
The structure of the Au/Si(557) surface is determined from three-dimensional x-ray diffraction measurements, which directly mandate a single Au atom per unit cell. We use a "heavy atom" method in which the Au atom images the rest of the structure. Au is found to substitute for a row of first-layer Si atoms in the middle of the terrace, which then reconstructs by step rebonding and adatoms. The structure is consistent with the 1D metallic behavior seen by photoemission.
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ورودعنوان ژورنال:
- Physical review letters
دوره 88 9 شماره
صفحات -
تاریخ انتشار 2002