扭曲的双层石墨烯中超导的超导性由WSe稳定2
Ruiheng Su1,2, Manabendra Kuiri1,2, Kenji Watanabe3
1Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada.
Nature materials
|August 28, 2023
概括
在WSe2附近的扭曲双层石墨烯 (TDBG) 中发现了超导性. 这一发现促进了对二维材料中非常规超导的理解.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 两维材料研究研究二维材料研究.
- 超导电性 超导电性 超导电性
背景情况:
- 在基于石墨烯的系统中,非传统的超导性尚未得到充分理解.
- 在扭曲的单层石墨烯中观察到超导性,但不是双层石墨烯.
- 这两种系统都表现出拓平面带和对称性破裂状态.
研究的目的:
- 为了研究扭曲双层石墨烯 (TDBG) 的超导性.
- 确定石墨烯系统中超导的基本组件.
主要方法:
- 扭曲双层石墨烯 (TDBG) 样本的制造.
- 靠近 WSe 的距离2.
- 通过不同的扭转角度和门调节进行电气传输测量.
主要成果:
- 在TDBG中观察到的超导率在扭转角度为1.24°和1.37°.
- 在价值带和导电带中都存在超导口袋.
- 超导体的出现来自离极化阶段附近的范霍夫奇点和同脊柱对称性破坏.
结论:
- 高密度的状态与TDBG中的超导性相关.
- 异轴线波动可能在超导配对中起作用.
- 发现为探索非传统超导体提供了新的途径.
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