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.

我们研究了基于高温超导薄膜的不对称纳米桥（ANB）。 ANB 预计将在高频下充当整流器。 ANB 的几何形状为“K”形。阿布里科索夫涡只能在收缩边缘处进入ANB，因此ANB处出现棘轮效应。在适当的磁场下，棘轮效应会导致 ANB 的临界电流减小。我们研究了不同薄膜厚度和不同宽度 ANB 的临界电流降低幅度。实验结果表明，有效穿透深度是决定ANB特性的关键参数。我们还准备了由两个 ANB 组成的 SQUID。当我们增加施加的磁场时，我们观察到 SQUID 上产生的电压的长期调制以及周期性调制。虽然尚未观察到临界电流的大调制深度，但这一结果表明在电路参数优化后将获得大幅降低。

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

Demonstration of Vortex RatchetEffect in YBa2Cu3O7-xAsymmetrical Nanobridges

YBa2Cu3O7-x不对称纳米桥中涡旋棘轮效应的演示

• 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

Demonstration of Vortex Ratchel Effect in YBa2Cu3O7－X Asymmentrical Nanobridges

YBa2Cu3O7－X不对称纳米桥中涡旋棘轮效应的演示

• 发表时间: 2012
• 作者: 藤沢 匠;他;Yi Yang;Masumi Inoue;山口裕資;斉藤輝雄;Kemmei Kajino
• 通讯作者: Kemmei Kajino