Transport anisotropy arising from a quasi-1D supermodulation in the van der Waals actinide UOTe

Superlattices with unidirectional features often exhibit intriguing direction-dependent transport behavior. Here, we report the observation of a spontaneously formed quasi-1D supermodulation in the van der Waals actinide UOTe. Electron microscopy reveals intricate domain patterns composed of two orthogonal supermodulation directions, indicative of a spontaneous symmetry-breaking origin, which is further substantiated by our density functional theory calculations. Transport measurements show an anisotropic resistance upturn and pronounced angle-dependent magnetoresistance. These findings establish quasi-1D supermodulated UOTe as a compelling platform for investigating the microscopic origin of transport anisotropy and emergent electronic behavior in correlated quantum materials.