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

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.

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

References in corpus (3)

• Quantum transport in a multiwalled carbon nanotube
• Shell structure and electron-electron interaction in self-assembled InAs quantum dots
• Ellipsoidal deformation of vertical quantum dots

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