کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5425589 | 1395861 | 2006 | 7 صفحه PDF | دانلود رایگان |

We investigate the multilayer relaxation trends in the vicinal Cu(p,p,p â 2) surfaces employing the all-electron full-potential linearized augmented plane-wave method. Calculations are performed for the (3 3 1), (2 2 1), (5 5 3), (3 3 2), (7 7 5), and (4 4 3) surfaces, which have 3, 4, 5, 6, 7, and 8 atom-rows in the terrace, respectively. The following trends are identified: (i) The interlayer relaxations perpendicular to the surface scale almost linearly with the number of atom-rows in the terraces. (ii) The nearest-neighbor distances do not depend on the surface termination, but only on the local coordination. (iii) For Cu(p,p,p â 2) in which the topmost n surface layers have nearest-neighbor coordination smaller than the bulk Cu (calculated for the unrelaxed surfaces), the topmost (n â 1) interlayer spacings (d12, â¦Â , dnâ1,n) contract compared with the unrelaxed spacing, while the nth interlayer spacing (dn,n+1) expands. The next (n â 2) interlayer spacings (dn+1,n+2, â¦Â , d2nâ2,2nâ1) contract, while the interlayer spacing indicated by d2nâ1,2n expands. A similar rule was found for the relaxations parallel to the surfaces. These trends provide a better understanding of the atomic structure of vicinal Cu surfaces.
Journal: Surface Science - Volume 600, Issue 15, 1 August 2006, Pages 3008-3014