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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
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Abstract

We study the electronic structure of a single self-assembled InAs quantum dot by probing elastic single-electron tunneling through a single pair of weakly coupled dots. In the region below pinch-off voltage, the non-linear threshold voltage behavior provides electronic addition energies exactly as the linear, Coulomb blockade oscillation does. By analyzing it, we identify the s and p shell addition spectrum for up to six electrons in the single InAs dot, i.e. one of the coupled dots. The evolution of shell addition spectrum with magnetic field provides Fock-Darwin spectra of s and p shell.

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T. Ota, K. Ono, M. Stopa, T. Hatano, S. Tarucha, H. Z. Song, Y. Nakata, T. Miyazawa, T. Ohshima, N. Yokoyama. 2004-05-24. Single-dot spectroscopy via elastic single-electron tunneling through a pair of coupled quantum dots. https://doi.org/10.1103/physrevlett.93.066801

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