可调节的量子干扰仪用于相关的莫雷电子.
Shuichi Iwakiri1, Alexandra Mestre-Torà2, Elías Portolés3
1Laboratory for Solid State Physics, ETH Zurich, CH-8093, Zurich, Switzerland. siwakiri@phys.ethz.ch.
Nature communications
|January 9, 2024
概括
研究人员观察到Little-Parks和Aharonov-Bohm效应在魔法角度扭曲的双层石墨烯moiré设备中. 这证实了库珀对的2e电荷,并揭示了莫雷电子的长相干长.
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
- 量子现象是一种量子现象.
背景情况:
- 魔法角度扭曲的双层石墨烯表现出可调节的相关状态,包括超导.
- 莫伊尔装置允许研究超导性和电子相干性的性质.
- 像Little-Parks和Aharonov-Bohm这样的基本连贯效应以前没有在moiré设备中报告过.
研究的目的:
- 为了研究moiré设备中的基本连贯效应.
- 在一个单一的设备中研究Little-Parks和Aharonov-Bohm效应.
- 探究超导性和电子连贯性在魔法角度扭曲双层石墨烯中的性质.
主要方法:
- 用魔法角度扭曲的双层石墨烯制造一个门定义环装置.
- 在关联或带绝缘体内嵌入超导或正常导电的环.
- 应用磁场和不同的载体密度来观察量子现象.
主要成果:
- 在超导相图中观察Little-Parks效应,证实有效电荷为2e.
- 在正常导电环中展示阿哈罗诺夫-博姆效应.
- 测量超过几微米的连贯度长度,用于在50mK时传导莫雷电子.
- 识别一个 h/e 周期振荡和超导体类非线性传输的模式.
结论:
- 这项研究成功地观察了Little-Parks和Aharonov-Bohm效应在一个单一的moiré设备中.
- 这些发现证实了库珀对电荷,并揭示了莫雷电子中异常长的连贯长度.
- 这项工作为探索莫伊尔超级晶圆中的量子现象开辟了新的途径.
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