Thickness induced structural transition in suspended fcc metal nanofilms

被引:66
作者
Hasmy, A [1 ]
Medina, E [1 ]
机构
[1] Inst Venezolano Invest Cient, Ctr Fis, Lab Fis Estadist Sistemas Desordenados, Caracas 1020A, Venezuela
关键词
D O I
10.1103/PhysRevLett.88.096103
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Recent experiments show that at a critical thickness, surface forces can dominate the bulk coercing suspended Au nanofilms to globally reconstruct from the (001) to the (111) orientation. Here we perform molecular dynamics simulations demonstrating that such transformations are generic to other fcc metals. This contrasts with surface reconstruction on the bulk occurring only in 5d metals. We show that this phenomenon occurs once a small energy barrier is overcome and discuss the relation of such a barrier and the critical thickness to film surface area and boundary conditions.
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页数:4
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