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STM tip-induced atomic motion on the top of film supported by a metal substrate

Huang Ren-Zhong Liu Liu Yang Wen-Jing

STM tip-induced atomic motion on the top of film supported by a metal substrate

Huang Ren-Zhong, Liu Liu, Yang Wen-Jing
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Publishing process
  • Received Date:  06 December 2010
  • Accepted Date:  29 January 2011
  • Published Online:  15 November 2011

STM tip-induced atomic motion on the top of film supported by a metal substrate

  • 1. College of Physics Science and Technology, Shenyang Normal University, Shenyang 110034, China;
  • 2. Max-Planck-Institut für Mikrostrukturphysik,Halle D-06120, Germany

Abstract: We investigate the scanning tunneling microscopy (STM) tip-modulated atomic motion on the top of Co island and interlayer mass transport on the island edge based on the molecular static (MS) method. Our results show that STM manipulation has an important effect on Co atomic diffusion on the top of Co island and on the island edge. The interaction of the STM tip with the adatom and the strong shape transitions in Co island and in the Cu(001) substrate result in the change of the jump diffusion barrier on the top of the island, the Ehrlich-Schwoebel(E-S) and exchange barrier on the island edge. It is found that by adjusting the distance between the tip and the substrate one can reduce the diffusion barrier of the above three diffusion processes and transform the growth mode of the Co films from 3D to 2D.

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