Strongly interacting electrons in solid-state systems often display multiple broken symmetries in the ground state. The interplay between different order parameters can give rise to a rich phase diagram. We report on the identification of intertwined phases with broken rotational symmetry in magic-angle twisted bilayer graphene (TBG). Using transverse resistance measurements, we find a strongly anisotropic phase located in a “wedge” above the underdoped region of the superconducting dome. Upon its crossing with the superconducting dome, a reduction of the critical temperature is observed. Furthermore, the superconducting state exhibits an anisotropic response to a direction-dependent in-plane magnetic field, revealing nematic ordering across the entire superconducting dome. These results indicate that nematic fluctuations might play an important role in the low-temperature phases of magic-angle TBG.

固态系统中强相互作用的电子通常在基态下显示出多个破碎的对称性。不同阶数参数之间的相互作用会产生丰富的相位图。我们报告了在魔术角扭曲双层石墨烯（TBG）中具有旋转对称性破坏的缠结相的鉴定。使用横向电阻测量，我们发现一个强各向异性相位于超导圆顶的欠掺杂区域上方的“楔形区”中。在其与超导圆顶相交时，观察到临界温度降低。此外，超导状态对与方向相关的面内磁场表现出各向异性响应，从而揭示了整个超导圆顶上的向列顺序。