旋转轨道驱动的四分之一半金属在角形石墨烯中
Jing Ding1,2, Hanxiao Xiang1,2, Naitian Liu1,2
1Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science, Westlake University, Hangzhou, 310030, China.
Advanced materials (Deerfield Beach, Fla.)
|November 5, 2025
概括
研究人员通过添加旋转轨道合 (SOC) 来观察多层石墨烯中的四分之一半金属. 这为探索半金属性质,相关性和先进材料的拓学开辟了新的途径.
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:
- 半金属具有独特的电子性质,这是由于电子和孔的共存.
- 体多层石墨烯表现出三角形曲线,在费米表面附近产生半金属状态.
研究的目的:
- 为了研究四分之一半金属在方形多层石墨烯中的出现.
- 探索旋转轨道合 (SOC) 对该材料电子和拓特性的影响.
主要方法:
- 通过WSe2近距离引入旋转轨道合 (SOC).
- 测量霍尔电阻和纵向电阻.
- 对异常霍尔效应和温度依赖性的分析.
主要成果:
- 观察四分之一半金属阶段,其特点是消失的霍尔电阻和抛物线纵向电阻.
- 由SOC引起的自发对称性破坏和时间逆转对称性破坏.
- 由于极化电子孔共存,异常霍尔电阻的非单调温度依赖.
- 在磁场下从四分之一半金属到切恩绝缘体的相位过渡.
结论:
- 带有SOC的面多层石墨烯是研究半金属中强相关性和拓学的有希望的平台.
- 这些发现提供了关于电子相关性,拓学和对称性破坏在新型量子材料中的相互作用的见解.
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