反铁磁材料对FeSeTe超导体的近距离作用
Hongming Zhang1,2, Christopher Luth1,2, Rajveer Jha1,2
1Department of Electrical and Computer Engineering, J. J. Pickle Research Campus, 10100 Burnet Road Bldg 160, Austin, Texas 78758, United States.
ACS applied materials & interfaces
|February 13, 2025
概括
对FeSeTe超导体的2D反铁磁MnPS3的近距离效应增强了上临界场,并显示了载体信号的变化,表明了新型超导装置的潜力.
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
- 两维材料是二维材料.
背景情况:
- 超导材料表现出独特的量子现象.
- 二维 (2D) 材料为探索量子效应提供了新的平台.
- 反铁磁 (AFM) 材料可以通过近距离效应影响相邻的超导体.
研究的目的:
- 为了研究二维反铁磁MnPS3对剥落的FeSeTe (FST) 超导体的近距离效应.
- 分析AFM合对超导特性,如临界温度和临界场的影响.
- 了解潜在的机制,包括载体运输和旋动态.
主要方法:
- 剥皮的FeSeTe超导样本的表征.
- 通过在FeSeTe上叠加MnPS3,制造AFM/FST异构结构.
- 在不同磁场 (B//c和B//ab) 下测量电电阻.
- 热激活能和霍尔效应的分析.
- 对电流-电压 (IV) 特性进行研究.
主要成果:
- 观察到超导过渡温度 (Tc^zero) 的边际增加.
- 在AFM/FST样本中发现了上临界场 (Bc2) 的显著增强.
- 热激活的流量流和增加的平面内临界场是明显的.
- 霍尔效应在150K以下的信号变化表明双载体介导的运输.
- 观察到临界电流 (Ic) 的下降以及量子相位滑动的证据.
结论:
- 2D AFM MnPS3的近距离效应显著改变了FeSeTe.Te的超导特性.
- 观察到的Bc2和载体运输的变化凸显了通过磁性近距离调整超导的潜力.
- 量子相位滑动和双载体运输表明AFM/超导体接口的复杂相互作用.
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