Superconductivity in strongly correlated electron systems frequently exhibits broken rotational symmetry, raising fundamental questions about the underlying order parameter symmetry. In this work, we demonstrate that electronic nematicity--driven by Coulomb-mediated rotational symmetry breaking--serves as a crucial link to understanding the nature of superconductivity. Utilizing a novel framework of angle-resolved measurement, we reveal an interring angular interplay among nematicity, superconductivity, and strange metallicity in magic-angle twisted trilayer graphene. By establishing a direct correlation between the preferred superconducting transport direction and the principal axis of the metallic phase, our findings place strong constrains on the symmetry of the superconducting order parameter. This work introduces a new paradigm for probing the microscopic mechanisms governing superconductivity in strongly interacting two-dimensional systems.
@article{arxiv.2503.15767,
title = {Angular Interplay of Nematicity, Superconductivity, and Strange Metallicity in a Moir\'e Flat Band},
author = {Naiyuan J. Zhang and Pavel A. Nosov and Ophelia Evelyn Sommer and Yibang Wang and Kenji Watanabe and Takashi Taniguchi and Eslam Khalaf and J. I. A. Li},
journal= {arXiv preprint arXiv:2503.15767},
year = {2025}
}
Comments
8 pages and 4 figures for main text. 10 pages and 9 figures for method section