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Phonon runaway in nanotube quantum dots

L. Siddiqui·A. W. Ghosh·S. Datta
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Abstract

We explore electronic transport in a nanotube quantum dot strongly coupled with vibrations and weakly with leads and the thermal environment. We show that the recent observation of anomalous conductance signatures in single-walled carbon nanotube (SWCNT) quantum dots can be understood quantitatively in terms of current driven `hot phonons' that are strongly correlated with electrons. Using rate equations in the many-body configuration space for the joint electron-phonon distribution, we argue that the variations are indicative of strong electron-phonon coupling requiring an analysis beyond the traditional uncorrelated phonon-assisted transport (Tien-Gordon) approach.

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L. Siddiqui, A. W. Ghosh, S. Datta. 2006-08-30. Phonon runaway in nanotube quantum dots. https://doi.org/10.1103/physrevb.76.085433

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