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arXiv 1004.3074cond-mat.mes-hall
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用直流电检测单电子晶体管的机械谐振

Detection of mechanical resonance of a single-electron transistor by direct current

Yu. A. Pashkin, T. F. Li, J. P. Pekola, O. Astafiev, D. A. Knyazev, F. Hoehne, H. Im, Y. Nakamura, J. S. Tsai

摘要:

我们已经暂停了铝基单电子晶体管,其岛可以自由谐振之间的源极和漏极引线形成的钳位。除了常规的侧栅极之外,对SET岛具有更大电容的底栅极被放置在下面,以增加SET与机械运动的耦合。该器件可以看作是一个双夹持的铝梁,它可以将机械振动转化为SET电流的变化。我们的模拟正统模型的基础上,从实验中估计的SET参数,再现所观察到的输运特性的细节。

英文摘要:

We have suspended an Al based single-electron transistor whose island can resonate freely between the source and drain leads forming the clamps. In addition to the regular side gate, a bottom gate with a larger capacitance to the SET island is placed underneath to increase the SET coupling to mechanical motion. The device can be considered as a doubly clamped Al beam that can transduce mechanical vibrations into variations of the SET current. Our simulations based on the orthodox model, with the SET parameters estimated from the experiment, reproduce the observed transport characteristics in detail.

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