Temperature independent current deficit due to induced quantum nanowire vibrations

Details Temperature independent current deficit due to induced quantum nanowire vibrations Temperature independent current deficit due to induced quantum nanowire vibrations

2009-01-26

arxiv.org/abs/0901.4017v2

New J. Phys. 11, 073037 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1088/1367-2630/11/7/073037

We consider electronic transport through a suspended voltage-biased nanowire. By coupling the tunneling current to a transverse magnetic field, vibrational modes of the wire are excited which influences the current-voltage characteristics of the system in novel ways through the induced electron-vibron interaction. From this analysis, we find that at high voltages the current through the suspended nanowire is offset from its non-vibrating ohmic value by an amount that is independent of both bias voltage and temperature. We also show that the corrections to the current from the back-action of the vibrating wire decay exponentially in the limit of high voltage, a result that holds even if the nanowire vibrational modes have been driven out of thermal equilibrium.

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