非表示:
キーワード:
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要旨:
Atomic scale switches working at room temperature represent the ultimate level of device
miniaturization. Using scanning tunneling microscopy, we find a bistable switching between two
mirror-symmetric configurations of self-assembled magic rare earth silicide clusters on the Si(111)
7 X 7 surface. Density functional theory reveals an energy barrier of 1.3 eV between the two cluster
configurations, suppressing the switching even at room temperature. However, intentional switch-
ing between the two states is possible in the presence of a close tunneling tip due to a tip-induced
lowering of the energy barrier.
