超导性研究有望给远距离输电和量子计算等领域带来变革，然而人们对超导性的理解仍不完整。在许多 高温超导体中，超导并非直接由常规金属态产生，而是先进入一种奇特的中间态——赝能隙态。此时电 子行为异常，可流动的能态减少。理解赝能隙被认为是揭示超导机理、设计更优材料的关键。 在母体材料中，电子通常形成反铁磁有序，即相邻自旋方向相反。通过掺杂增加或减少电子后，这种有 序会被削弱。长期以来，研究人员认为掺杂会彻底破坏长程磁性，而赝能隙正是在这种近乎无序状态下 出现的。 此次研究对这一认识提出新证据。研究团队借助超冷原子量子模拟器，在接近绝对零度的条件下，用锂 原子构建费米—哈伯德模型，并将原子排列在激光形成的光学晶格中，在高度可控环境下模拟电子间的 相互作用。 借助量子气体显微镜，团队逐个成像原子及自旋状态，在不同温度和掺杂条件下采集超过3.5万张高分 辨率图像。分析显示，尽管长程反铁磁序在掺杂后消失，但在极低温条件下仍存在稳定的短程磁性关 联。 进一步分析发现，当以特定温度标度比较时，不同掺杂和温度下的磁性关联可归并到统一曲线，而这一 温标与赝能隙出现的特征温度高度一致，表明赝能隙与被削弱但仍存在的磁性结构密切相关。 ...

Core Insights - The Massachusetts Institute of Technology (MIT) physicists have observed key evidence of unconventional superconductivity in twisted trilayer graphene (MATTG), which is a significant step towards achieving room-temperature superconductivity [1][2] - Room-temperature superconductivity could enable technologies such as zero-energy transmission cables, efficient power grids, and practical quantum computing systems [1] - MATTG exhibits unique quantum properties due to its specific twisting angle, leading to the emergence of a new research field known as "twisted electronics" [1] Summary by Sections - **Unconventional Superconductivity**: The direct observation of superconducting energy gaps and zero-resistance characteristics in MATTG indicates that its electron pairing mechanism differs from traditional superconductors, suggesting a new superconducting mechanism [1][2] - **Experimental Methodology**: A newly developed experimental platform combined electron tunneling measurements with electrical transport tests, allowing simultaneous observation of superconducting energy gaps and zero-resistance states [1] - **Future Research Directions**: The research team plans to explore more twisted structures and materials using the new platform, aiming to uncover the nature of electron pairing and quantum state competition, which could lead to the design of new efficient superconductors and quantum computing materials [2]