在魔法角石墨烯多层中促进超导性
Yiran Zhang1,2,3, Robert Polski1,2, Cyprian Lewandowski2,3
1T. J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA.
Science (New York, N.Y.)
|September 29, 2022
概括
在二烯化物上使用魔法角度扭曲的石墨烯多层显示风味极化和超导性. 增加层增强了超导性,突出了这些复杂的电子阶段中波段相互作用的作用.
科学领域:
- 凝聚物质物理学
- 材料科学
- 量子材料
背景情况:
- 石墨烯摩埃尔超级网表现出复杂的相关绝缘,拓和超导相.
- 相关性和拓的起源与平面带有关,但超导性仍然不太清楚.
研究的目的:
- 在过渡金属二基基板上研究扭曲的多层和五层石墨烯的超导性和风味极化.
- 探索层数和带结构对新出现的电子相的影响.
主要方法:
- 在单层化物上制造魔法角度扭曲的三,四,五层石墨烯装置.
- 电传输测量以探测绝缘状态和超导性.
- 分析电位移场和载体填充因子的影响.
主要成果:
- 在扭曲的石墨烯多层中证明了风味极化和超导性.
- 在三层和四层石墨烯中观察到电场诱导的绝缘状态.
- 超导性在延伸的填充因子范围内出现,层数增加,特别是在五层石墨烯中.
结论:
- 平面和分散带之间的相互作用对于扩展石墨烯超导区域至关重要.
- 层工程和基板相互作用提供了调整和增强moiré系统中的超导性的途径.
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