Negative differential resistance due to the resonance coupling of a quantum-dot dimer

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Electron tunneling through a coupled quantum-dot dimer under a dc-bias is investigated. We find that a peak in the $I$-$V$ curve appears at low temperature when two discrete electronic states in the two quantum dots are aligned with each other -- resonance coupling. This leads to a negative differential resistance. The peak height and width depend on the dot-dot coupling. At high temperature, the peak disappears due to thermal smearing effects.
9 pages, 8 figures. It has been submitted to Journal of Physics: Condensed Matter

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/21335

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0305018
 http://arxiv.org/abs/cond-mat/0305018

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arXiv