High-Temperature Superconductor Diode Devices Prepared with Nano-Fabrication Technique

纳米加工技术制备的高温超导二极管器件

• 批准号: 23656238
• 负责人: FUJIMAKI Akira
• 金额: $ 2.58万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656238/
• 关键词: 超伝導; ナノブリッジ; 単一磁束量子回路; ボルテックス; 磁束量子; ダイオード; 整流素子

We have studied on asymmetrical nano-bridges (ANBs) based on high-temperature superconducting films. The ANBs are expected to be act as a rectifier at high frequencies. The ANBs have "K" shapes in their geometry. Abrikosov vortices can enter the ANBs only at the constricted edges, so that the Ratchet effect appears at ANBs. The Ratchet effect leads to the reduction of the critical currents of ANBs under appropriate magnetic fields. We investigate the magnitude of the critical current reduction for different film thicknesses and different widths of ANBs. Experimental results show that the effective penetration depth is a key parameter to determine the characteristics of the ANBs. We also prepare SQUIDs consisting of two ANBs. We have observed long-term modulations in voltages generated across the SQUIDs together with periodic modulations when we increase applied magnetic fields. Although the large modulation depth of critical currents have not been observed, this result suggests that large reduction would be obtained afteroptimization of the circuit parameters.

我们已经研究了基于高温超导膜的不对称纳米桥（ANB）。预计ANB将在高频上充当整流器。 ANB的几何形状具有“ K”形状。 Abrikosov Vortices只能在收缩的边缘输入ANB，因此棘轮效果出现在ANBS上。棘轮效应导致在适当的磁场下降低ANB的临界电流。我们研究了不同膜厚度和不同宽度ANB的临界电流还原的大小。实验结果表明，有效的穿透深度是确定ANB的特征的关键参数。我们还准备由两个ANB组成的鱿鱼。当我们增加施加的磁场时，我们已经观察到在整个鱿鱼产生的电压以及周期性调制中产生的长期调制。尽管尚未观察到临界电流的较大调制深度，但该结果表明，在对电路参数的视为中，将获得大幅度降低。

项目成果

回路化プロセスにおける積層型ジョセフソン接合の特性評価

电路化过程中堆叠约瑟夫森结的特性评估

• 发表时间: 2011
• 作者: S. Iba;S. Koh;and H. Kawaguchi;T. Tokuda;福岡賢明,梶野顕明,安 保宇,井上真澄,藤巻 朗
• 通讯作者: 福岡賢明,梶野顕明,安 保宇,井上真澄,藤巻 朗

Numerical analysis on exclusion effect of vortices from superconducting thin films by using time-dependent Ginzburg-Landau equation

基于时变Ginzburg-Landau方程的超导薄膜涡流排斥效应数值分析

• 发表时间: 2012
• 作者: S. Mizoguchi;S. Tsutsumi;K. Kajino;H. Akaike;M. Inoue;and A. Fujimaki
• 通讯作者: and A. Fujimaki

Simulation Study on the Vortex Behavior in Asymmetrical Superconducting Films for DevelopingNanobridge Devices

用于开发纳米​​桥器件的非对称超导薄膜中涡流行为的模拟研究

• 发表时间: 2012
• 作者: M. Inoue;K. Kajino;S. Mizoguchi;B. An;T. Fukuoka;M. Yamamoto and A. Fujimaki
• 通讯作者: M. Yamamoto and A. Fujimaki

High Temperature Superconductor Vertically Stacked Josephson Junctions without Excess Currents for Digital Cirsuit Applications

用于数字电路应用的无过量电流的高温超导体垂直堆叠约瑟夫森结

• 发表时间: 2012
• 作者: 藤沢 匠;黒木 渉平;石井 孔明;野田 俊彦;笹川 清隆;徳田 崇;太田 淳;Takaaki Fukuoka
• 通讯作者: Takaaki Fukuoka

超伝導薄膜上における磁束排除効果のモート形状依存性の数値解析

超导薄膜磁通排斥效应护城河形状依赖性的数值分析

• 发表时间: 2012
• 作者: Y. Yamaguchi;Y. Tatematsu;N. Yamada;T. Saito;R. Ikeda;J. C. Mudiganti;I. Ogawa;T. Idehara;溝口翔太,井上真澄,藤巻 朗
• 通讯作者: 溝口翔太,井上真澄,藤巻 朗