在层叠的拓半金属中设计巨大的霍尔响应
Grigorii Skorupskii1, Fabio Orlandi2, Iñigo Robredo3,4
1Department of Chemistry, Princeton University, Princeton, 08540, NJ, USA.
Nature communications
|November 23, 2024
概括
研究人员开发了一种化学设计策略,以发现新的非平面磁铁,Ln3Sn7,非常适合用于自旋电子. 这些材料表现出高载体流动性和巨大的霍尔响应,超过了现有的基准.
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
- 化学 化学 化学
背景情况:
- 非平面磁铁对于自旋电子应用至关重要.
- 发现和设计这种材料带来了重大挑战.
- 现有的材料往往缺乏先进的自旋电子设备所需的性能.
研究的目的:
- 开发一种新的化学设计策略,用于识别非共平面磁铁.
- 探索Ln3Sn7 (Ln = Dy, Tb) 作为一种新的非平面磁性材料类.
- 研究这些材料的自旋特征,包括霍尔反应和载体移动性.
主要方法:
- 针对具有脱的磁子网和不相似的单离子异性质的分层材料.
- 将这些与一个方形网状的拓半金属子网格相结合.
- 合成和表征Ln3Sn7材料,测量它们的电磁性质.
主要成果:
- 成功识别了一系列非平面磁铁,Ln3Sn7 (Ln = Dy,Tb).
- Ln3Sn7 呈现出高载体流动性,超过 17,000 cm2·V−1·s−1.1.
- 观察到一个巨大的霍尔反应,其异常霍尔角为0.17,霍尔导电率超过42,000 Ω-1·cm-1.1.
结论:
- 化学设计策略对于发现新型非平面磁体是有效的.
- 与Co3Sn2S2.2.等既定基准相比,Ln3Sn7材料表现出优越的性能.
- 这些发现为使用非共平面磁性材料的先进的自旋电子应用开辟了新的途径.
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