کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5366304 | 1388347 | 2006 | 4 صفحه PDF | دانلود رایگان |

Room temperature deposition of Sn on Cu(1 0 0) gives rise to a rich variety of surface reconstructions in the submonolayer coverage range. In this work, we report a detailed investigation on the phases appearing and their temperature stability range by using low-energy electron diffraction and surface X-ray diffraction. Previously reported reconstructions in the submonolayer range are p(2 Ã 2) (for 0.2 ML), p(2 Ã 6) (for 0.33 ML), (32Ã2)R45° (for 0.5 ML), and c(4 Ã 4) (for 0.65 ML). We find a new phase with a â4204 structure for a coverage of 0.45 ML. Furthermore, we analyze the temperature stability of all phases. We find that two phases exhibit a temperature induced reversible phase transition: the (32Ã2)R45° phase becomes (2Ã2)R45° phase above 360 K, and the new â4204 phase becomes p(2 Ã 2) also above 360 K. The origin of these two-phase transitions is discussed.
Journal: Applied Surface Science - Volume 252, Issue 15, 30 May 2006, Pages 5331-5334