Single-dot spectroscopy via elastic single-electron tunneling through a pair of coupled quantum dots

T. Ota, K. Ono, M. Stopa, T. Hatano, S. Tarucha, H. Z. Song, Y. Nakata, T. Miyazawa, T. Ohshima, N. Yokoyama

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

The electronic structure of a single self-assembled InAs quantum dot was investigated with the precise manipulation of the energy levels of the dots. Elastic single-electron tunneling was probed through a pair of weakly coupled quantum dots. A double layer of InAs dots embedded in a sub-micron size pillar was employed and a single vertical pair of dots was isolated by depleting the structure with a side gate. The nonlinear threshold voltage behavior provided electronic addition energies in the region below pinch-off voltage, which was similar to Coulomb blockade oscillation. Fock-Darwin spectra of the s and p shells was provided by the evolution of the shell addition spectrum with magnetic field.

Original languageEnglish
Article number066801
Pages (from-to)066801-1-066801-4
JournalPhysical review letters
Volume93
Issue number6
DOIs
Publication statusPublished - 2004 Aug 6

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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