Reconfigurable Quantum-Dot Molecules Created by Atom Manipulation

2015/08/14 by Yi Pan, Jianshu Yang, Steven C. Erwin +2 · 1 citation
Physics and Astronomy · Engineering · #Quantum and electron transport phenomena #Surface and Thin Film Phenomena #Molecular Junctions and Nanostructures

paper · doi:10.1103/physrevlett.115.076803

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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