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在平面石墨烯-NbSe中具有高磁场稳定性
Ayelet Zalic1,2, Takashi Taniguchi3, Kenji Watanabe4
1The Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Nano letters
|June 22, 2023
概括
我们开发了一种新的,原子薄的范德瓦尔斯超导量子干扰装置 (SQUID). 该设备在磁场中具有很高的稳定性,并允许精确测量薄超导体中的电流分布.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 二化 (NbSe2) 即使在高内平面磁场中也表现出超导性.
- 原子薄的范德瓦尔斯异构结构具有独特的电子性质.
- 超导量子干扰装置 (SQUID) 是敏感的磁流探测器.
研究的目的:
- 构建和描述一本小说,原子薄,所有的范德瓦尔斯SQUID.
- 为了研究在高磁场下NbSe2超导的行为.
- 在当前分布测量中证明亚纳米的灵敏度.
主要方法:
- 使用NbSe2接触和石墨烯弱环的All van der Waals SQUID的制造.
- 测量关键电流干扰模式作为平面内磁场高达4.5 T的函数.
- 在高磁场下分析当前分布演变的分析.
主要成果:
- 2D平面SQUID在高内平面磁场下表现出独特的稳定性.
- 追踪了关键的电流干扰模式,揭示了电流分布的演变.
- 实现了对电流偏差的亚纳米敏度,显示了超电流在狭窄通道中的场驱动再分配.
- 提出了对不对称的SQUID几何学的新应用,以便在没有相位信息的情况下探测电流密度.
结论:
- 基于原子薄的NbSe2的范德瓦尔斯SQUID是超导的稳定和敏感的探测器.
- 高磁场诱导在薄的NbSe2.2中超电流分布的显著变化.
- 不对称的SQUID几何学为直流密度探测提供了一种新的方法.
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