STM tip-mediated mass transport on Cu surfaces

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	STM tip-mediated mass transport on Cu surfaces
	Y. S. N.; Huang Sun, R. Z.; Gao, T. F.; Zhang, R. J.; Wang, Y. M.
	2015
发表期刊	Applied Surface Science
ISSN	0169-4332
卷号	327 页码:344-349
摘要	Atomic-scale simulations are performed to study atomic motion on Cu surfaces to illustrate the effect of the scanning tunneling microscopy tip on mass transport (MT) in the surfaces and on top of the Co island in heteroepitaxial Co/Cu(0 0 1) and Co/Cu(1 1 1) systems. First we investigate tip-induced atomic motion of Co atoms embedded in the Cu(0 0 1) surface at zero bias voltage. With the help of the tip, the Co atom in the surface can freely diffuse toward its nearby vacancy site. So-called vacancy mechanism is used to interpret this phenomenon. Then tip-mediated atomic motion of Co adatoms on the Co islands supported by a Cu(1 1 1) surface is studied. It is revealed that the tip has a significant effect on the diffusion of adatoms on the islands and interlayer mass transport at the island edge. Interlayer mass transport at the island edge is found to depend strongly on the tip height and the lateral distance from the tip. By calculating the diffusion barriers, it is found that the jumping diffusion barrier on the island can be zero by the tip vertical manipulation while the Ehrlich-Schwoebel diffusion barrier at the island edge can be reduced by the tip lateral manipulation. Thus, the quality of thin films can be improved by controlling MT in and/or on the surface. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[sun, y. s. n. ; huang, r. z. ; gao, t. f.] shenyang normal univ, coll phys sci & technol, shenyang 110034, peoples r china. [zhang, r. j.] fudan univ, sch informat sci & engn, shanghai 200433, peoples r china. [wang, y. m.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; huang, rz (reprint author), shenyang normal univ, coll phys sci & technol, huanghe st 253, shenyang 110034, peoples r china. ; renzhonghuang@synu.edu.cn
关键词	Scanning Tunneling Microscopy Atomic Manipulation Mass Transport Film Growth Scanning-tunneling-microscopy Transition-metals Activation-energy Diffusion Growth Potentials Cu(001) Adatoms Motion
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73929
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. S. N.,Huang Sun, R. Z.,Gao, T. F.,et al. STM tip-mediated mass transport on Cu surfaces[J]. Applied Surface Science,2015,327:344-349.
APA	Y. S. N.,Huang Sun, R. Z.,Gao, T. F.,Zhang, R. J.,&Wang, Y. M..(2015).STM tip-mediated mass transport on Cu surfaces.Applied Surface Science,327,344-349.
MLA	Y. S. N.,et al."STM tip-mediated mass transport on Cu surfaces".Applied Surface Science 327(2015):344-349.