Probing Wigner correlations in a suspended carbon nanotube

Abstract

The influence of the electron-vibron coupling on the transport properties of a strongly interacting quantum dot built in a suspended carbon nanotube is analyzed. The latter is probed by a charged AFM tip scanned along the axis of the CNT which induces oscillations of the chemical potential and of the linear conductance. These oscillations are due to the competition between finite-size effects and the formation of a Wigner molecule for strong interactions. Such oscillations are shown to be suppressed by the electron-vibron coupling. The suppression is more pronounced in the regime of weak Coulomb interactions, which ensures that probing Wigner correlations in such a system is in principle possible.

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Cited by in corpus (5)

• Quantum transport in carbon nanotubes
• Fractional charge oscillations in quantum spin Hall quantum dots
• Helical gaps in interacting Rashba wires at low electron densities
• Shape-sensitive Pauli blockade in a bent carbon nanotube
• Crystallization of fractional charges in a strongly interacting quasi-helical quantum dot