Nematicity Arising from a Chiral Superconducting Ground State in Magic-Angle Twisted Bilayer Graphene under In-Plane Magnetic Fields

Recent measurements of the resistivity in magic-angle twisted bilayer graphene near superconducting transition temperature show two-fold anisotropy, or nematicity, when changing direction an in-plane magnetic field [Cao \textit{et al.}, Science \textbf{372}, 264 (2021)]. This was interpreted as strong evidence for exotic nematic superconductivity instead widely proposed chiral superconductivity. Counter-intuitively, we demonstrate that two-dimensional superconductors can hybridize two order parameters to induce a phase shows nematicity transport response. Its paraconductivity is modulated $\cos(2\theta_{\bf B})$, with $\theta_{\bf B}$ being field, consistent experiment graphene. We therefore suggest response reported by Cao al.} does not rule out ground state.