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

TitleQuantum phases in a doped mott insulator on the Shastry-Sutherland lattice
Publication TypeJournal Article
Year of Publication2007
AuthorsLiu J, Trivedi N, Lee YB, Harmon BN, Schmalian J
Journal TitlePhysical Review Letters
Volume99
Pages227003
Date PublishedNov
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000251327500054
KeywordsDIMER GROUND-STATE, MAGNETIZATION PLATEAUS, model, SPIN SYSTEM SRCU2(BO3)(2), superconductivity, TRANSITIONS
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.

DOI10.1103/PhysRevLett.99.227003
Alternate JournalPhys. Rev. Lett.