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arXiv 1002.2998cond-mat.mes-hall
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诱导型GaAs单孔晶体管的制备与表征

Fabrication and characterization of an induced GaAs single hole transistor

O. Klochan, J. C. H. Chen, A. P. Micolich, A. R. Hamilton, K. Muraki, Y. Hirayama

摘要:

我们制作了一个在未掺杂的AlGaAs-GaAs异质结的单孔晶体管,并进行了表征。我们的器件由p型量子点组成,使用电场而不是调制掺杂来填充。低温输运测量揭示了由于库仑阻塞引起的周期性电导振荡。我们发现,低频电荷噪声与调制掺杂GaAs单电子晶体管(SET)中的电荷噪声相当,并且几乎比硅SET中的电荷噪声好一个数量级。

英文摘要:

We have fabricated and characterized a single hole transistor in an undoped AlGaAs-GaAs heterostructure. Our device consists of a p-type quantum dot, populated using an electric field rather than modulation doping. Low temperature transport measurements reveal periodic conductance oscillations due to Coulomb blockade. We find that the low frequency charge noise is comparable to that in modulation-doped GaAs single electron transistors (SETs), and almost an order of magnitude better than in silicon SETs.

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