Long-range inhibition of the W(001) clean surface displacive phase by nitrogen
- 14 October 1979
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 12 (19) , L755-L759
- https://doi.org/10.1088/0022-3719/12/19/003
Abstract
Half-order LEED beam intensities and half-widths produced by the low-temperature ( square root 2* square root 2)R45 degrees displacive phase on W(001) have been determined as a function of nitrogen adatom coverage. The clean surface structure is found to be strongly inhibited by very low coverages (1-2*1013 atoms/cm2, or 1-2% of a monolayer), and the radius of influence of a N adatom pair is estimated as 20 AA. The results provide evidence for the influence of long-range effects, such as charge-density waves or surface-state coupling, on the formation of the ordered displacive phase.Keywords
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