Moiré quantum matter has emerged as a materials platform in which correlated and topological phases can be explored with unprecedented control. Among them, magic-angle systems constructed from two or three layers of graphene have shown robust superconducting phases with unconventional characteristics^1,2,3,4,5. However, direct evidence of unconventional pairing remains to be experimentally demonstrated. Here we show that magic-angle twisted trilayer graphene exhibits superconductivity up to in-plane magnetic fields in excess of 10 T, which represents a large (2–3 times) violation of the Pauli limit for conventional spin-singlet superconductors^6,7. This is an unexpected observation for a system that is not predicted to have strong spin–orbit coupling. The Pauli-limit violation is observed over the entire superconducting phase, which indicates that it is not related to a possible pseudogap phase with large superconducting amplitude pairing. Notably, we observe re-entrant superconductivity at large magnetic fields, which is present over a narrower range of carrier densities and displacement fields. These findings suggest that the superconductivity in magic-angle twisted trilayer graphene is likely to be driven by a mechanism that results in non-spin-singlet Cooper pairs, and that the external magnetic field can cause transitions between phases with potentially different order parameters. Our results demonstrate the richness of moiré superconductivity and could lead to the design of next-generation exotic quantum matter.

莫尔量子物质已经成为一种材料平台，可以在其中以前所未有的控制探索相关和拓扑相。其中，由两层或三层石墨烯构成的魔角系统已显示出具有非常规特性的稳健超导相^1,2,3,4,5。然而，非常规配对的直接证据仍有待实验证明。在这里，我们展示了魔角扭曲三层石墨烯在超过 10 T 的面内磁场中表现出超导性，这代表了对传统自旋单重态超导体的泡利极限的大（2-3 倍）违反^6,7. 对于一个预计不会有强自旋轨道耦合的系统来说，这是一个意想不到的观察结果。在整个超导相上都观察到泡利极限违反，这表明它与具有大超导幅度配对的可能的赝带隙相无关。值得注意的是，我们在大磁场中观察到重入超导性，其存在于更窄的载流子密度和位移场范围内。这些发现表明，魔角扭曲三层石墨烯的超导性可能是由一种导致非自旋单线态库珀对的机制驱动的，并且外部磁场可能导致具有潜在不同顺序参数的相之间的转变。