在铁磁Fe3GeTe2和约瑟夫森道中通过范德瓦尔斯异质连接引起的近距离超导性
Guojing Hu1,2, Changlong Wang1,3, Jingdi Lu4
1Hefei National Laboratory for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China, Hefei 230026, China.
ACS nano
|January 30, 2025
概括
研究人员证明了几层铁磁铁 telluride (Fe3GeTe2) 与二化 (NbSe2) 结合的超导性. 这一发现揭示了超导和铁磁之间令人惊的和,为自旋电子和量子计算打开了大门.
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
- 量子计算是一种量子计算.
背景情况:
- 超导和铁磁通常是对立的,因为电子自旋状态不兼容.
- 利用它们的协同作用可以推进非分离式自旋电子学和拓量子计算.
- 范德瓦尔斯 (vdW) 铁磁铁提供可调节的平台来探索这种相互作用.
研究的目的:
- 调查超导和铁磁在vdW异构结构中的共存和相互作用.
- 为了证明几层铁磁铁---化 (FGT) 的超导性.
- 解开这两个不同的量子现象之间的微观兼容性.
主要方法:
- 制造一个vdW异构结构,其中包括超导二化 (NbSe2),绝缘隔离器和几层铁磁FGT.
- 运输测量以检测零电阻和约瑟夫森超电流.
- 测量异常霍尔效应 (AHE) 和磁力显微镜 (MFM) 来确认铁磁性.
主要成果:
- 实验证据表明,在几层FGT中,当接近与NbSe2.2相合时,具有超导性的实验证据.
- 观察FGT在NbSe2.2.的超导临界温度以下的电阻急剧降至零.
- 通过NbSe2/绝缘器/FGT连接点检测约瑟夫森超流的流量.
- 证实FGT在超导体制中保留了其铁磁性质.
结论:
- 在VDW异构结构中证明了超导和铁磁的共存.
- 揭示了这两个看似对立的秩序之间的微观和.
- 强调了这种混合系统在未来的自旋电子和量子计算应用中的潜力.
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