Phys. Rev. B 46, 12837–12840 (1992)Transport spectroscopy of a confined electron system under a gate tip
Conductance resonances measured for split-gate structures around threshold are interpreted in terms of single-electron tunneling through a quantum dot beneath the tip of the gate finger. Measurements at different values of source-drain voltage allow the spectroscopy of excited states for a fixed number of electrons in the quantum dot. The measured magnetic-field dependence of the conductance resonances is consistent with a minimal number of seven electrons in the quantum dot. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.46.12837
DOI:
10.1103/PhysRevB.46.12837
PACS:
72.20.My, 73.40.Gk, 71.50.+t
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