Bias and temperature dependence of the noise in a single electron transistor

被引：6

作者：

Henning, T ^{[1
]}

Starmark, B ^{[1
]}

Claeson, T ^{[1
]}

Delsing, P ^{[1
]}

机构：

[1] Gothenburg Univ, Chalmers Tekn Hogskola AB, S-41296 Gothenburg, Sweden

来源：

EUROPEAN PHYSICAL JOURNAL B | 1999年 / 8卷 / 04期

关键词：

D O I：

10.1007/s100510050730

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A single electron transistor based on Al-AlOx-Nb tunnel junctions was fabricated by shadow evaporation and in situ barrier formation. Its output current noise was measured, using a transimpedance amplifier setup, as a function of bias voltage, gain, and temperature, in the frequency range (1-300) Hz. The spot noise at 10 Hz is dominated by a gain dependent component, indicating that the main noise contribution comes from fluctuations at the input of the transistor. Deviations from ideal input charge noise behaviour are found in the form of a bias dependence of the differential charge equivalent noise, i. e. the derivative of current noise with respect to gain. The temperature dependence of this effect could indicate that heating is activating the noise sources; and that they are located inside or in the near vicinity of the junctions.

引用

页码：627 / 633

页数：7

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