在UTe2中,f电子相关性和磁兴奋之间的连接
Thomas Halloran1,2, Peter Czajka1,2, Gicela Saucedo Salas1,2
1NIST Center for Neutron Research, Gaithersburg, MD 20899 USA.
概括
研究人员使用中子散射研究了超导体UTe2中的磁刺激. 他们发现这些激发是场独立的,可能源于f电子杂交.
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
- 量子磁力 量子磁力 量子磁力
背景情况:
- 了解UTe2的奇特性质,它是旋转三重体超导体的候选者,对于推进量子材料研究至关重要.
- 低能磁刺激在新型材料的超导机制中起着关键作用.
研究的目的:
- 为了研究UTe2.2中磁性激发的详细的异构分散.
- 探索应用磁场对这些刺激的影响.
- 为了阐明观察到的磁激发的起源.
主要方法:
- 无弹性中子散射被用来探测磁刺激.
- 实验是在低温下进行的,并且应用了高达11特斯拉的磁场.
- 对散射强度的分析提供了对磁时刻性质的见解.
主要成果:
- 揭示了低温,低能量的磁性激发的详细异型分散.
- 磁刺激从Brillouin区域边界在Y点和T点出现,并沿c轴分散.
- 发现磁力在 (hk0) 平面上是独立于场的,直至11 T.
结论:
- 散射强度表明U3+/U4+ f电子旋转具有沿c轴的偏好方向.
- 确定波动的磁矩为1.7~5) 玻尔磁子.
- 来自f电子杂交的带间自旋刺激被提出为UTe2.2中的磁性刺激的起源.
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