Enhancing the conductance of a two-electron nanomechanical oscillator

2007/02/28 by J. R. Johansson, Lev Mourokh, L. G. Mourokh +3
Engineering · Physics and Astronomy · #Force Microscopy Techniques and Applications #Mechanical and Optical Resonators #Molecular Junctions and Nanostructures #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.77.035428

published as Phys. Rev. B 77, 035428 (2008) · 16 pages, 5 figures

openalex publication_date 2008/01/22 · arxiv created 2008/02/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We consider electron transport through a mobile island (i.e., a nanomechanical oscillator) which can accommodate one or two excess electrons and show that, in contrast to immobile islands, the Coulomb blockade peaks, associated with the first and second electrons entering the island, have different functional dependences on the nano-oscillator parameters when the island coupling to its leads is asymmetric. In particular, the conductance for the second electron (i.e., when the island is already charged) is greatly enhanced in comparison to the conductance of the first electron in the presence of an external electric field. We also analyze the temperature dependence of the two conduction peaks and show that these exhibit different functional behaviors.

Citations

• Vibrational Coherences in Single Electron Tunneling through Nanoscale Oscillators
• Accuracy of a mechanical single-electron shuttle
• Phonon effects in molecular transistors: Quantal and classical treatment
• Franck-Condon Blockade and Giant Fano Factors in Transport through Single Molecules
• Nanomechanical Resonator Shuttling Single Electrons at Radio Frequencies