Quantum Phases in a Doped Mott Insulator on the Shastry-Sutherland Lattice

Jun Liu, Nandini Trivedi, Yongbin Lee, B. N. Harmon, and Jörg Schmalian
Phys. Rev. Lett. 99, 227003 – Published 30 November 2007

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.

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  • Received 3 February 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.227003

©2007 American Physical Society

Authors & Affiliations

Jun Liu1, Nandini Trivedi2, Yongbin Lee1, B. N. Harmon1, and Jörg Schmalian1

  • 1Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA
  • 2Department of Physics, Ohio State University, Columbus, Ohio 43210, USA

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Vol. 99, Iss. 22 — 30 November 2007

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