在非超导的二化中孤儿高场超导
Corey E Frank1,2, Sylvia K Lewin3,4, Gicela Saucedo Salas3,4
1NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA. cef2@umd.edu.
Nature communications
|April 20, 2024
概括
在UTe2晶体中,极端磁场揭示了一个新的高场超导体. 这种"孤儿"超导体出现时没有零场前体,挑战了现有的理论.
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
背景情况:
- 回流超导通常需要零场超导相.
- 磁场通常会破坏超导.
研究的目的:
- 为了研究UTe2晶体在极端磁场下的行为.
- 在UTe2.2中识别新的超导状态.
主要方法:
- 对UTe2晶体进行高磁场 (37-52 T) 的实验应用.
- 超导相对于晶体轴的角度依赖性研究.
主要成果:
- 在UTe2中发现了一个缺少零场母相的高场超导体.
- 这种"孤儿"超导存在于特定的角度 (29-42度) 和高场 (37-52T).
结论:
- 在UTe2中存在场诱导的孤儿超导,这违背了当前的理论理解.
- 这一发现表明,超导性可以被高磁场诱导到材料中,而这些材料在零电场下不是超导的.
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