Reconfigurable Quantum-Dot Molecules Created by Atom Manipulation

Physical Review Letters
Yi PanStefan Fölsch

Abstract

Quantum-dot molecules were constructed on a semiconductor surface using atom manipulation by scanning tunneling microscopy (STM) at 5 K. The molecules consist of several coupled quantum dots, each of which comprises a chain of charged adatoms that electrostatically confines intrinsic surface-state electrons. The coupling takes place across tunnel barriers created reversibly using the STM tip. These barriers have an invariant, reproducible atomic structure and can be positioned-and repeatedly repositioned-to create a series of reconfigurable quantum-dot molecules with atomic precision.

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Citations

Oct 7, 2016·Journal of Chemical Theory and Computation·Matteo BarboriniStefano Corni

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