Force, Current and Field Effects in Single Atom Manipulation
作者:
K.‐F. Braun,
S.‐W. Hla,
N. Pertaya,
H.‐W. Soe,
C. F. J. Flipse,
K.‐H. Rieder,
期刊:
AIP Conference Proceedings
(AIP Available online 1903)
卷期:
Volume 696,
issue 1
页码: 109-116
ISSN:0094-243X
年代: 1903
DOI:10.1063/1.1639684
出版商: AIP
数据来源: AIP
摘要:
We present a detailed investigation of the manipulation of Ag and Au atoms with a STM tip on the Ag(111) surface at 5K. The interpretation of the feed‐back loop signal gives a precise picture of the movement of the atom during manipulation. The threshold tunnelling resistance and tip‐height to move a Au/Ag atom have been determined using automated manipulation measurements. The results show that at low biases chemical forces dominate in the manipulation process. Above ≈ ±70 mV tunnelling voltage Au atoms start to move already at greater tip‐atom separation, which can be attributed to a current effect. Tip‐induced diffusion was used to measure the influence of the electric field which can be ruled out at low biases. © 2003 American Institute of Physics
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