Lapse of transmission phase and electron molecules in quantum dots

Details Lapse of transmission phase and electron molecules in quantum dots Lapse of transmission phase and electron molecules in quantum dots

2007-04-10

arxiv.org/abs/0704.1260v3

Phys. Rev. B77, 201302(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Slightly expanded version, PRB Rapid Communications, in press

Scientific paper

10.1103/PhysRevB.77.201302

The puzzling behavior of the transition phase through a quantum dot can be understood in a natural way via a formation of the electron molecule in the quantum dot. In this case the resonance tunneling takes place through the quasi-stationary (doorway) state, which emerges when the number of electrons occupying the dot reaches a certain ``critical'' value, $N_{cr}$. Our estimation of this quantity agrees with the experimental data. The dependence of $N_{cr}$ on the dot's size is predicted as well.

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