Helium-atom diffraction study of the submonolayer structures of sodium on Cu(001)
Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 56, Issue: 23, Page: 15378-15390
1997
- 33Citations
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Article Description
The structure and low-frequency vibrations of submonolayer coverages of sodium adsorbed on Cu(001) have been investigated using high-resolution helium-atom diffraction and time-of-flight measurements at (Formula presented) and 100 K. At low coverages, (Formula presented) the overlayer structures are determined by a strong repulsive interaction between neighboring sodium atoms, while the low-energy vibrations are characterized by a parallel frustrated translation mode ((Formula presented)-mode) frequency of (Formula presented) At higher coverages, (Formula presented) a series of quasi-one-dimensional structures are observed, and are accompanied by a substantial lowering of the (Formula presented)-mode frequency to (Formula presented) The diffraction patterns and low (Formula presented)-mode frequencies strongly indicate that the sodium atoms form one-dimensional islands in this coverage range. © 1997 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000480041&origin=inward; http://dx.doi.org/10.1103/physrevb.56.15378; https://link.aps.org/doi/10.1103/PhysRevB.56.15378; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.56.15378/fulltext; http://link.aps.org/article/10.1103/PhysRevB.56.15378
American Physical Society (APS)
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