Abstract
We propose the projected BCS wave function as the ground state for the doped Mott insulator on the Shastry-Sutherland lattice. At half filling this wave function yields the exact ground state. Adding mobile charge carriers, we find a strong asymmetry between electron and hole doping. Upon electron doping an unusual metal with strong valence bond correlations forms. Hole doped systems are -wave resonating valence bond superconductors in which superconductivity is strongly enhanced by the emergence of spatially varying plaquette bond order.
- Received 3 February 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.227003
©2007 American Physical Society