Shell-Tunneling Spectroscopy of the Single-Particle Energy Levels of Insulating Quantum Dots

E.P.A.M. Bakkers; Z. Hens; A. Zunger; A Franceschetti; L.P. Kouwenhoven; L. Gurevich; D. Vanmaekelbergh

doi:10.1021/nl015572b

Shell-Tunneling Spectroscopy of the Single-Particle Energy Levels of Insulating Quantum Dots

E.P.A.M. Bakkers, Z. Hens, A. Zunger, A Franceschetti, L.P. Kouwenhoven, L. Gurevich, D. Vanmaekelbergh

Photonics and Semiconductor Nanophysics

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Abstract

The energy levels of CdSe quantum dots are studied by scanning tunneling spectroscopy. By varying the tip-dot distance, we switch from "shell-filling" spectroscopy (where electrons accumulate in the dot and experience mutual repulsion) to "shell-tunneling" spectroscopy (where electrons tunnel, one at a time, through the dot). Shell-tunneling spectroscopy provides the single-particle energy levels of the CdSe quantum dot. The results of both types of tunneling spectroscopy are compared with pseudopotential many-body calculations.

Original language	English
Pages (from-to)	551-556
Number of pages	6
Journal	Nano Letters
Volume	1
Issue number	10
DOIs	https://doi.org/10.1021/nl015572b
Publication status	Published - 2001

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T1 - Shell-Tunneling Spectroscopy of the Single-Particle Energy Levels of Insulating Quantum Dots

AU - Bakkers, E.P.A.M.

AU - Hens, Z.

AU - Zunger, A.

AU - Franceschetti, A

AU - Kouwenhoven, L.P.

AU - Gurevich, L.

AU - Vanmaekelbergh, D.

PY - 2001

Y1 - 2001

N2 - The energy levels of CdSe quantum dots are studied by scanning tunneling spectroscopy. By varying the tip-dot distance, we switch from "shell-filling" spectroscopy (where electrons accumulate in the dot and experience mutual repulsion) to "shell-tunneling" spectroscopy (where electrons tunnel, one at a time, through the dot). Shell-tunneling spectroscopy provides the single-particle energy levels of the CdSe quantum dot. The results of both types of tunneling spectroscopy are compared with pseudopotential many-body calculations.

AB - The energy levels of CdSe quantum dots are studied by scanning tunneling spectroscopy. By varying the tip-dot distance, we switch from "shell-filling" spectroscopy (where electrons accumulate in the dot and experience mutual repulsion) to "shell-tunneling" spectroscopy (where electrons tunnel, one at a time, through the dot). Shell-tunneling spectroscopy provides the single-particle energy levels of the CdSe quantum dot. The results of both types of tunneling spectroscopy are compared with pseudopotential many-body calculations.

U2 - 10.1021/nl015572b

DO - 10.1021/nl015572b

M3 - Article

SN - 1530-6984

VL - 1

SP - 551

EP - 556

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

Shell-Tunneling Spectroscopy of the Single-Particle Energy Levels of Insulating Quantum Dots

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