Formation of one-dimensional ordered alloy at step edges: An atomistic study of the (2 x 1) Ni/Pt alloy on the Pt(997) surface

被引：12
|
作者：
Essolaani, Wafa [2 ]
Picaud, Fabien [1 ]
Ramseyer, Christophe [1 ]
Gambardella, Pietro [3 ]
Said, Moncef [2 ]
Spanjaard, Daniel [4 ]
Desjonqueres, Marie-Catherine [5 ]
机构：
[1] Univ Franche Comte, UTINAM B, UMR 6213, F-25030 Besancon, France
[2] Univ Monastir, UR Phys Solides, Monastir, Tunisia
[3] AMS Grp, Inst Catala Nanotecnol, Bellaterra, Barcelona, Spain
[4] Univ Paris 11, Lab Phys Solides, UMR 8502, F-91405 Orsay, France
[5] CEA Saclay, DSM IRAMIS SPCSI, F-91191 Gif Sur Yvette, France
来源：
SURFACE SCIENCE | 2011年 / 605卷 / 9-10期
关键词：
Monte Carlo simulations; Scanning tunneling microscopy; Growth; Surface defects; Metal; Magnetic heterostructures; MAGNETIC-PROPERTIES; NI-PT; GROWTH; DEHYDROGENATION; ACETYLENE; CO;
D O I：
10.1016/j.susc.2011.02.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Kinetic Monte Carlo simulations based on a semi-empirical description of the metal-metal interactions are developed to interpret the formation of a one-dimensional Ni/Pt alloy observed at the step feet of the vicinal Pt(997) surface. Deposition of 0.15 monolayer of Ni atoms at T<300 K leads to the formation of a (2 x 1) well-ordered nanowire in agreement with scanning tunneling microscopy observations. Exchange process between Ni and Pt atoms at the upper step edge and neighboring influence appear to be the key point to explain such a well-ordered 1D alloy. In addition, a subtle decoration of the step adsorption sites is also necessary. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：917 / 922
页数：6
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