Simple Model for Corrugation in Surface Alloys Based on First-Principles Calculations.

Simple Model for Corrugation in Surface Alloys Based on First-Principles Calculations.
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DOI:
10.3390/ma13194444
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发表时间:
2020-10-07
期刊:
Materials (Basel, Switzerland)
影响因子:
--
通讯作者:
Ishii F
Ishii F
中科院分区:
其他
文献类型:
--
作者:
Nur M;Yamaguchi N;Ishii F

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用第一性原理计算方法系统地研究了M/Ag(111)表面合金的结构稳定性,其中M为III族元素(B,Al,Ga,In,Tl),IV族元素(C,Si,Ge,Sn,Pb),V族元素(N,P,As,Sb,Bi)。重点讨论了由M原子在最高原子平面上距Ag原子的高度决定的波纹参数d,得到了M/Ag(111)中原子半径与波纹的关系.用一个简单的硬球原子模型就可以理解双折射参数d的变化趋势。本文介绍了一种由表面合金中的原子半径决定的新的表面合金原子半径,它不仅适用于M/Ag(111)-体系,而且适用于其它表面合金的结构的快速预测。
The structural stability of M/Ag(111)– surface alloys is systematically investigated by using first-principles calculations, where M is a member of group III (B, Al, Ga, In, Tl), IV (C, Si, Ge, Sn, Pb), and V (N, P, As, Sb, Bi) elements. We focus on the corrugation parameter d which is determined by the height of the M atom from the Ag atom in the plane of the top-most atom, and the relation between atomic radii and corrugations in M/Ag(111) is obtained. The tendencies of the corrugation parameter d can be understood by using a simple hard spherical atomic model. We introduce a new type of atomic radii determined by the corrugation in surface alloys, surface alloy atomic radii, which can be useful for rapid predictions of the structures of surface alloys, not only for M/Ag (111)– systems but also for other surface alloys.
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