Nanowerk September 15, 2021
Recent measurements of the resistivity in magic-angle twisted bilayer graphene near the superconducting transition temperature show twofold anisotropy, or nematicity, when changing the direction of an in-plane magnetic field. This was interpreted as strong evidence for exotic nematic superconductivity instead of the widely proposed chiral superconductivity. An international team of researchers (Germany, USA – the Flatiron Institute, Spain) has suggested a surprising connection between the nematic behavior of a superconductor in a magnetic field and its spiral-like ground state in the absence of the field. Their theory could not only explain recent experiments on twisted bilayer graphene at the so-called magic angle but would also point to potential applications in topological quantum computing…read more. TECHNICAL ARTICLE
Nematic and Hall responses of the driven state by an in-plane magnetic field…Credit: Phys. Rev. Lett. 127, 127001, 13 September 2021Â