Superconductivity in the doped quantum spin liquid on the triangular lattice

Broad interest in quantum spin liquid (QSL) phases was triggered by the notion that they can be viewed as insulating with preexisting electron-pairs, such upon light doping might automatically yield superconductivity. Yet despite intense efforts, definitive evidence is lacking. We address problem of a lightly doped QSL through large-scale density-matrix renormalization group study $t$-$J$ model on triangular lattice small but non-zero concentration holes. The ground state consistent Luther-Emery power-law superconducting and charge-density-wave correlations associated partially-filled charge stripes. In particular, are dominant both four-leg six-leg cylinders at all hole concentrations. Our results provide direct evidences naturally lead to robust