Spatially resolved manipulation of single electrons in quantum dots using a scanned probe

Abstract

The scanning metallic tip of a scanning force microscope was coupled capacitively to electrons confined in a lithographically defined gate-tunable quantum dot at a temperature of 300 mK. Single electrons were made to hop on or off the dot by moving the tip or by changing the tip bias voltage owing to the Coulomb-blockade effect. Spatial images of conductance resonances map the interaction potential between the tip and individual electronic quantum dot states. Under certain conditions this interaction is found to contain a tip-voltage induced and a tip-voltage independent contribution.

4 pages, 4 figures

References in corpus (12)

• Quantum Computation with Quantum Dots
• Energy spectra of quantum rings
• Coherent Branched Flow in a Two-Dimensional Electron Gas
• The microscopic nature of localization in the quantum Hall effect
• Direct Coulomb and Exchange Interaction in Artificial Atoms
• Imaging Fractal Conductance Fluctuations and Scarred Wave Functions in a Quantum Billiard
• Topographic Mapping of the Quantum Hall Liquid using a Few-Electron Bubble
• Signatures of spin pairing in a quantum dot in the Coulomb blockade regime
• Spin transitions in a small Si quantum dot
• Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring
• Potential landscapes and induced charges near metallic islands in three dimensions
• Kelvin Probe Spectroscopy of a Two-Dimensional Electron Gas Below 300 mK

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