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Science 13 August 1993:
Vol. 261. no. 5123, pp. 886 - 888
DOI: 10.1126/science.261.5123.886
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Articles

Reversible Rotation of Antimony Dimers on the Silicon (001) Surface with a Scanning Tunneling Microscope

Y. W. Mo 1

1 IBM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598

The scanning tunneling microscope (STM) was used to control the configuration of antimony clusters on the (001) surface of silicon. In particular, the STM tip induced a reversible rotation between two orthogonal orientations of individual antimony dimers on the surface. This simple rotation can be explained by an atomic-scale torque exerted on the antimony dimers by the STM tip. The reversibility of this process could provide a basis for making atomic-scale memory cells.

Submitted on March 5, 1993
Accepted on May 13, 1993

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Science. ISSN 0036-8075 (print), 1095-9203 (online)