运输证据的当前诱导的阴性迪拉克谷在一个平度-时间-对称的反铁磁体
Hideaki Sakai1,2, Yuya Miyamoto3, Motoi Kimata4,5
1Department of Physics, University of Osaka, Toyonaka, Osaka, Japan. hideaki.sakai@tohoku.ac.jp.
Nature communications
|January 7, 2026
概括
研究人员在SrMnBi2中观察到独特的非互惠磁电阻,SrMnBi2是一种具有平价时间对称性的材料. 这一发现为电流诱导的电子阴性提供了实验证据,并为反铁磁自旋电子学打开了大门.
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
- 这就是Spintronics.
背景情况:
- 带有时间逆转对称性破裂的巡回反铁磁体表现出很大的磁传输反应.
- 反铁磁体中的平价时间对称性,反转对称性被打破,预测电流诱导的电子阴性和非线性传输.
- 对这些现象的实验证据很少.
研究的目的:
- 实验性地研究平价时间对称反铁磁体中的非互惠运输现象.
- 探索电流诱导的对称性破坏在电子阴性中的作用.
- 为了证明电磁控制反铁磁域对齐和谷地属性.
主要方法:
- 在SrMnBi2.2.中测量双重非互惠的角磁阻.
- 使用现象学框架进行定量建模,以分析角和场依赖性.
- 通过电流场冷却来证明反铁磁域对齐.
主要成果:
- 在SrMnBi2.2.中观察到两倍非互惠的角磁电阻.
- 揭示了狄拉克谷的四倍旋转反转对称的电流诱导的破坏.
- 证明了对抗铁磁域和f波极性的电磁控制.
- 展示了可切换的非互惠运输,与当前可调节的山谷阴性联系在一起.
结论:
- 在平价时间对称的反铁磁体中实验验证电流诱导的电子阴性.
- SrMnBi2 具有可切换的非相互传输特性.
- 基于这些发现,新的反铁磁螺旋和谷磁应用的潜力.
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