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arXiv · 1311.0611

Resonance, Fermi surface topology, and Superconductivity in Cuprates

Yuan Zhou·Haiyang Zhang·Haiqing Lin·Chang-De Gong
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Abstract

The resonance, a collective boson mode, was usually thought to be a possible glue of superconductivity. We argue that it is rather a natural product of the \emph{d}-wave pairing and the Fermi surface topology. A universal scaling $E_{res}/2Δ^{H}_{S}\sim 1.0$ ($Δ_{S}^{H}$ the magnitude of superconducting gap at hot spot) is proposed for cuprates, irrespective of the hole-/electron-doping, low-/high-energy resonance, monotonic/nonmonotonic \emph{d}-wave paring, and the parameters selected. We reveal that there may exist two resonance peaks in the electron-doped cuprates. The low- and high- energy resonance, originated from the contributions of the different intra-band component, is intimately associated with the Fermi surface topology. By analyzing the data of inelastic neutron scattering, we conclude the nonmonotonic \emph{d}-wave superconducting pairing symmetry in the electron-doped cuprates, which is still an open question

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Yuan Zhou, Haiyang Zhang, Haiqing Lin, Chang-De Gong. 2013-11-04. Resonance, Fermi surface topology, and Superconductivity in Cuprates. https://arxiv.org/abs/1311.0611

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