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Superconducting pairing symmetry in frustrating t-J model: Electronic Raman absorption
Authors:Email author" target="_blank">Hong-Yan?LuEmail author  Da?Wang  Li-Peng?Shi  San?Chen  Li-Qin?Zhang  Pi-Feng?Gong  Bao-Tong?Liu
Institution:1.School of Physics and Electronic Information,Huaibei Normal University,Huaibei,P.R. China;2.Department of Physics,University of California,La Jolla,USA;3.Department of Mathematics and Information Science,North China Institute of Water Conservancy and Hydroelectric Power,Zhengzhou,P.R. China
Abstract:Motivated by the controversy on the pairing symmetry of layered organic superconductors,we study electronic Raman scattering spectra on a frustrating lattice. A two-dimensionalt-t′-J-J′model and the Gutzwiller projectional variational method is used. The pairing symmetry isobtained self-consistently. Basing on this, we perform a systematic investigation of thedensity of states and electronic Raman spectra as a function oft′/t: ranging fromt′ = 0, the square lattice model, tot′ = t, the isotropic triangular latticemodel. We discuss the polarization dependence of the Raman spectra, which could be used toidentify the relevant superconducting pairing symmetry of frustrating systems such aslayered organic superconductors.
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