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MANIPULATING ATOMS ONE BY ONE WITH A SCANNING TUNNELING MICROSCOPE

Dehuan Huang and Yoshihisa Yamamoto
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Dehuan Huang: Yamamoto Quantum Fluctuation Project, ERATO, JRDC, NTT Musashino R&D Center, 3-9-11 Midoricho, Musashino, Tokyo 180, Japan
Yoshihisa Yamamoto: Yamamoto Quantum Fluctuation Project, ERATO, JRDC, NTT Musashino R&D Center, 3-9-11 Midoricho, Musashino, Tokyo 180, Japan;

Surface Review and Letters (SRL), 1996, vol. 03, issue 03, 1463-1472

Abstract: By using an STM operated in ultrahigh vacuum, we can extract single Si atoms from any predetermined positions of the Si(111)-(7×7)surface through field evaporation. This technique enables us to create novel atomic-scale structures, and even to fabricate a single atom groove and chain on the surface. The extracted Si atoms can be redeposited onto the surface, although the crystallographic position of these deposited Si atoms changes as their density increases. We have demonstrated that natural Si vacancy defects existing on the surface can be repaired by this technique. The deposited Si atoms can be reremoved by picking them up again with the tip, the substrate atomic arrangement remaining unperturbed. We can also remove individual hydrogen atoms from hydrogen-passivated Si(100)-(2×1)surfaces. A chain with equal separation of Si dimers produced by hydrogen desorption has been created. These results demonstrate the potential of STM for the construction of electronic devices with atomic dimensions.

Date: 1996
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DOI: 10.1142/S0218625X96002473

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