Coverage-Dependent Collective Diffusion of a Dense Pb Wetting Layer on Si(111)
| Title | Coverage-Dependent Collective Diffusion of a Dense Pb Wetting Layer on Si(111) |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Huang L, Wang CZ, Li MZ, Ho KM |
| Journal Title | Physical Review Letters |
| Volume | 108 |
| Pages | 026101 |
| Date Published | 01 |
| Type of Article | Article |
| ISBN Number | 0031-9007 |
| Accession Number | WOS:000298991400019 |
| Keywords | dynamics, frenkel-kontorova model, metals, SURFACE-DIFFUSION, TRANSPORT |
| Abstract | The dynamics of a dense Pb wetting layer on the Si(111) surface is studied in the framework of a generalized Frenkel-Kontorova model. Instead of the typical diffusion by random hopping processes, a liquidlike collective motion of the Pb atoms within the dense wetting layer is revealed to give rise to ultrafast kinetics of the wetting layer even at low temperatures. A kinetic Monte Carlo simulation including this collective spreading mechanism of the dense wetting layer quantitatively reproduces the experimental observations. |
| URL | <Go to ISI>://WOS:000298991400019 |
| DOI | 10.1103/PhysRevLett.108.026101 |
| Alternate Journal | Phys. Rev. Lett. |
