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

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

2004-05-24

arxiv.org/abs/cond-mat/0405545v1

Phys. Rev. Lett. 93, 066801 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 3 figures, Accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.066801

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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