High Q electromechanics with InAs nanowire quantum dots

Details High Q electromechanics with InAs nanowire quantum dots High Q electromechanics with InAs nanowire quantum dots

2011-08-16

arxiv.org/abs/1108.3255v1

Appl. Phys. Lett. 99, 213104 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages. Supplementary material at http://www.tifr.res.in/~nano

Scientific paper

10.1063/1.3663631

In this report, we study electromechanical properties of a suspended InAs nanowire (NW) resonator. At low temperatures, the NW acts as the island of a single electron transistor (SET) and we observe a strong coupling between electrons and mechanical modes at resonance; the rate of electron tunneling is approximately 10 times the resonant frequency. Above and below the mechanical resonance, the magnitude of Coulomb peaks is different and we observe Fano resonance in conductance due to the interference between two contributions to potential of the SET. The quality factor ($Q$) of these devices is observed $\sim10^5$ at 100 mK.

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