Superconductivity from a confinement transition out of a fractionalized Fermi liquid with ${\mathbb{Z}}_2$ topological and Ising-nematic orders

Shubhayu Chatterjee, Yang Qi, Subir Sachdev +1

The Schwinger-boson theory of the frustrated square lattice antiferromagnet yields a stable, gapped ${\mathbb{Z}}_2$ spin liquid ground state with time-reversal symmetry, incommensur…