Selection rules for transport excitation spectroscopy of few-electron quantum dots.
نویسندگان
چکیده
Tunneling of electrons traversing a few-electron quantum dot is strongly influenced by the Coulomb interaction leading to Coulomb blockade effects and single-electron tunneling. We present calculations which demonstrate that correlations between the electrons cause a strong suppression of most of the energetically allowed tunneling processes involving excited dot states. The excitation of center-of-mass modes, in contrast, is unaffected by the Coulomb interaction. Therefore, channels connected to these modes dominate the excitation spectra in transport measurements.
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عنوان ژورنال:
- Physical review letters
دوره 74 7 شماره
صفحات -
تاریخ انتشار 1995