Atom-wide Co Wires on Cu(775) at Room Temperature
We report on a surface phase of the Co-vicinal-Cu(111) system which exhibits self-assembled uniform Co quantum wires that are stable at 300 K. Scanning tunneling microscopy (STM)-imaging measurements show that wires will self-assemble within a narrow range of Co coverage and, within this range, the wires increase in length as coverage is increased. The STM images show that the wires form along the leading edge of the step rise, differentiating it from previously theoretically predicted atomic-wire phases. The formation of relatively long laterally unencapsulated one- and two-atom wires also differentiates it from past experimentally observed step-island formation. Furthermore, our experiments also show directly that the Co wires coexist with another Co phase that had been previously predicted for growth on Cu(111). Our observations allow us to comment on the formation kinetics of the atomic-wire phase and on the fit of our data to a recently developed lattice-gas model.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1040207
- Report Number(s):
- BNL-90616-2009-JA; R&D Project: PO-016; KC0202020; TRN: US1202350
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 80, Issue 15; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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