在添加的中观察磁性伪间隙行为
Suheon Lee1, Sangeun Cho2, Yongcheol Jo3
1Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang, 37673, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|July 25, 2025
概括
研究人员探索了配 (Si:P) 的磁性基态,揭示了Kondo凝结物中的关键旋转波动. 这些波动驱动了伪间隙的形成,为新的量子状态提供了洞察力.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子材料科学 量子材料科学
- 固态物理 固态物理
背景情况:
- 添加的 (Si:P) 呈现Kondo凝结,这种现象有可能产生新的多体量子态.
- Si:P的精确磁性基态和旋转动力学仍然不完全理解.
- 了解这些特性对于在量子应用中利用Si:P至关重要.
研究的目的:
- 为了阐明添加的磁性基本状态和旋转动力学.
- 为了研究Kondo凝结和Si:P.P.中的伪间隙形成之间的关系.
- 探索Si:P在实现新型量子现象方面的潜力.
主要方法:
- 电子和子自旋共振 (ESR和μSR) 光谱学.
- 光学光谱学. 光学光谱学.
- 特定热量的测量.
主要成果:
- 使用光学和ESR光谱学观察到150K以下的旋转相关性.
- 在TKC ≈0.2K以下的子旋转放松率 (λZF∼T-0.26(5) 的功率定律增加表明了临界旋转波动.
- 与这些磁波动同时存在一个类似巴丁-库珀-施里弗的电荷间隙,反映了莫特绝缘体中的伪间隙相.
结论:
- 在Kondo凝结物状态内的关键旋转波动被确定为Si:P中伪间隙形成的驱动力.
- 在Si:P中观察到的现象与杂的Mott绝缘体有相似之处,这表明伪间隙形成的共同机制.
- 这些发现有助于我们更好地理解多体量子态在被兴奋的半导体中.
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