基于合金的共振器用于量子信息系统.
Chen Yang1, Faranak Bahrami1, Guangming Cheng2
1Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ 08540.
概括
研究人员通过将合金合金成薄膜来增强超导电路. 这种材料工程方法将超导过渡温度 (Tc) 提高了40%,显示了未来超导设备开发的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 超导电路中的超导电路
背景情况:
- (Ta) 对于高性能超导电路至关重要,改善了量子比特的寿命和质量因素.
- 材料优化是推进超导电路技术的关键.
- 超导差距工程提供了一种扩展适合宿主材料的策略.
研究的目的:
- 探索以为基础的设备中的超导间隙工程.
- 研究将哈夫合金融入薄膜对超导性能的影响.
- 为了提高超导过渡温度 (Tc),用于更广泛的应用.
主要方法:
- 合金20原子百分比 (at.%) 哈夫成 (Ta) 薄膜.
- 系统地改变沉积条件以控制薄膜的方向和传输特性.
- 在毫克尔文温度下进行直流 (DC) 传输测量和微波测量.
主要成果:
- 在Ta-Hf合金膜中达到6.09K的超导过渡温度 (Tc).
- 与裸体Ta设备相比,观察到Tc增加了40%.
- 证实低温下双层系统和准粒子的损失贡献没有变化.
结论:
- 材料工程,特别是将哈夫合金变成,显著提高了超导性能.
- 在超导电路中,Ta-Hf合金显示出扩大材料范围的前景.
- 对于先进的超导装置,需要进一步探索材料候选.
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