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 RVB superconductors in which superconductivity is strongly enhanced by the emergence of inhomogeneous plaquette bond order.

arXiv comment4 pages, 3 figures

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Cited by in corpus (12)

• Quantum frustration in organic Mott insulators: from spin liquids to unconventional superconductors
• Frustration and the Kondo effect in heavy fermion materials
• Symmetry Protected Quantization and Bulk-Edge Correspondence of Massless Dirac Fermions: Application to Fermionic Shastry-Sutherland Model
• Electronic Transport on the Shastry-Sutherland Lattice in Ising-type Rare Earth Tetraborides
• First-principles investigation of symmetric and antisymmetric exchange interactions of SrCu${}_2$(BO${}_3$)${}_2$
• Emergent Bound States and Impurity Pairs in Chemically Doped Shastry-Sutherland System
• Mott transition and Antiferromagnetic Metal on Shastry-Sutherland Lattice
• Doped Valence Bond Solid and Superconductivity on the Shastry-Sutherland Lattice
• Supersolid phases of a doped valence-bond quantum antiferromagnet: Evidence for a coexisting superconducting order parameter
• Infinitely Multiple Steps in Magnetization of Ferro- and Antiferromagnetic Ising Models with Frustration on a Diamond Hierarchical Lattice
• Spectral evolution in a Shastry-Sutherland lattice, HoB(4)
• Theory of the Raman spectra of the Shastry-Sutherland antiferromagnet SrCu${}_2$(BO${}_3$)${}_2$ doped with nonmagnetic impurities