title: Quantum phases in a doped Mott insulator on the Shastry-Sutherland lattice.
abstract: We propose the projected BCS wave function as the ground state for the doped Mott insulator SrCu2(BO3)2 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 d-wave resonating valence bond superconductors in which superconductivity is strongly enhanced by the emergence of spatially varying plaquette bond order.
authors.affiliation: Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Nandini
authors.initials: N
authors.lastname: Trivedi
authors.forename: Yongbin
authors.initials: Y
authors.lastname: Lee
authors.forename: B N
authors.initials: BN
authors.lastname: Harmon
authors.forename: Jörg
authors.initials: J
authors.lastname: Schmalian