Quantum phases in a doped Mott insulator on the Shastry-Sutherland lattice

Details Quantum phases in a doped Mott insulator on the Shastry-Sutherland lattice Quantum phases in a doped Mott insulator on the Shastry-Sutherland lattice

2007-02-05

arxiv.org/abs/cond-mat/0702118v1

Phys. Rev. Lett. 99, 227003 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.99.227003

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.

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