2009/02/16 by Huai-Xiang Huang, Huaixiang Huang, Huang, Huai-Xiang +4
Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Theoretical and Computational Physics #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0902.2508
6 pages, 7 figures
arxiv created 2009/02/16 · openalex publication_date 2009/02/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
By using a renormalized mean-field theory, we investigate the phase diagram of t-t'-J-J' model on two dimensional Shastry-Sutherland lattice which are topologically equivalent to synthesized material SrCu2(BO3)2. We find that the symmetry of superconductivity ground state depends on the frustration amplitude η=t'/t and doping concentration. For weak to intermediate frustration, dx2-y2-wave pairing symmetry is robust in a large parameter region. Around the symmetric point |η|=1, d-wave, s-s-wave pairing as well as staggered flux may serve as ground state by varying the doping level. There is a first-order transition between these distinct ground states. For larger frustration |η|>1, the ground state has an s-s-wave symmetry for both hole and electron doping.