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

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arxiv cond-mat/0411264 v1 pith:DSNFD5AT submitted 2004-11-10 cond-mat.mes-hall

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

A. Pioda , S.Kicin , T. Ihn , M. Sigrist , A. Fuhrer , K. Ensslin , A. Weichselbaum , S. E. Ulloa
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M. Reinwald W. Wegscheider
This is my paper
classification cond-mat.mes-hall
keywords electronsquantuminteractionscanningsingletip-voltagebiascapacitively
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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.

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