Atomic scale switches based on self-assembled surface magic clusters

Franz, Martin; Panosetti, Chiara; Große, Jan; Amrhein, Tim; Reuter, Karsten; Dähne, Mario

doi:10.1063/1.5036946

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Atomic scale switches based on self-assembled surface magic clusters

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Citation

Franz, M., Panosetti, C., Große, J., Amrhein, T., Reuter, K., & Dähne, M. (2018). Atomic scale switches based on self-assembled surface magic clusters. Applied Physics Letters, 112(25): 253103. doi:10.1063/1.5036946.

Cite as: https://hdl.handle.net/21.11116/0000-000A-AB1C-7

Abstract

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.