高性能门控制超导开关:大输出电压和可重复性
Leon Ruf1, Elke Scheer1, Angelo Di Bernardo1
1Department of Physics, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany.
ACS nano
|July 26, 2024
概括
研究人员在设备中实现了高度可复制的门控制超电流 (GCS). 超导逻辑设备的这一进步表明GCS独立于收缩宽度,并改善了未来应用的输出电压.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 超导电子产品 超导电子产品
- 量子计算组件 量子计算组件
背景情况:
- 超导逻辑电路为高性能计算提供了潜力.
- 门控制超流 (GCS) 是开发超导逻辑的一个关键现象.
- 之前的GCS研究在可重现性和性能优化方面面临着挑战.
研究的目的:
- 为了研究表现出GCS的封闭 (Nb) 设备的可重现性和性能.
- 探索GCS,收缩宽度和泄漏电流之间的关系.
- 为了增强输出电压,以改善超导逻辑中的设备互连性.
主要方法:
- 多个门的Nb设备的制造和特征.
- 系统地调查GCS在变频门电压 (V_G) 的行为.
- 对设备性能进行统计分析,包括GCS,泄漏电流 (I_leak) 和输出电压.
主要成果:
- 在封闭的Nb设备中证明了高可重现的GCS.
- 发现GCS独立于约束宽度,与此前的发现相反.
- 证实了GCS和V_G诱导的泄漏电流 (I_leak) 之间的强烈相关性.
- 取得的输出电压超过了先前的报告超过一个数量级.
- 展示了I_leak作为一种在SiO2基板上调节操作V_G的工具.
结论:
- 这项研究显著提升了GCS设备可重现性和性能的优化.
- 结果为开发实用的超导逻辑电路铺平了道路.
- 确定了用于控制和优化GCS设备操作的关键参数 (I_leak).
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