| Автор | Y G Shen |
| Автор | J Yao |
| Автор | D J O'Connor |
| Автор | B V King |
| Автор | R J MacDonald |
| Дата выпуска | 1996-07-01 |
| dc.description | The structure and growth of ultrathin Au and Pd films on Cu(001) have been studied by low-energy ion scattering (LEIS) and low-energy electron diffraction (LEED). Due to the existence of a kinetic pathway for intermixing, both Au and Pd are incorporated into the Cu(001) surface at room temperature, forming a surface alloy at a coverage of 0.5 monolayer (ML). At Au coverage near 1.2 ML, the surface layer is pure Au; this is caused by Au-induced segregation from the underlying layer to the surface. No second- and/or third-layer Au is evident. In contrast to this, for the Pd/Cu(001) case a clock reconstruction is formed after deposition of 1 ML Pd. The LEIS data, through comparisons with 3-D computer simulation, reveal a 0.25 Å lateral clockwise - anticlockwise displacement of the first-layer Pd atoms. A simple model for this clock reconstruction is proposed. The driving force behind the dealloying for the Cu - Au alloy and Pd-induced reconstructing for the Cu - Pd surface is also discussed. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Au-segregated dealloying and Pd-induced clock reconstructing of Cu(001) |
| Тип | paper |
| DOI | 10.1088/0953-8984/8/27/004 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 8 |
| Первая страница | 4903 |
| Последняя страница | 4918 |
| Аффилиация | Y G Shen; Department of Physics, University of Newcastle, New South Wales 2308, Australia |
| Аффилиация | J Yao; Department of Physics, University of Newcastle, New South Wales 2308, Australia |
| Аффилиация | D J O'Connor; Department of Physics, University of Newcastle, New South Wales 2308, Australia |
| Аффилиация | B V King; Department of Physics, University of Newcastle, New South Wales 2308, Australia |
| Аффилиация | R J MacDonald; Department of Physics, University of Newcastle, New South Wales 2308, Australia |
| Выпуск | 27 |
