Imaging a Single-Electron Quantum Dot

Details Imaging a Single-Electron Quantum Dot Imaging a Single-Electron Quantum Dot

2005-01-07

arxiv.org/abs/cond-mat/0501150v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages including 3 figures

Scientific paper

Images of a single-electron quantum dot were obtained in the Coulomb blockade regime at liquid He temperatures using a cooled scanning probe microscope (SPM). The charged SPM tip shifts the lowest energy level in the dot and creates a ring in the image corresponding to a peak in the Coulomb-blockade conductance. Fits to the lineshape of the ring determine the tip-induced shift of the electron energy state in the dot. SPM manipulation of electrons in quantum dots promises to be useful in understanding, building and manipulating circuits for quantum information processing.

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