Gap-function symmetry and spin dynamics in electron-doped cuprate superconductors

2007/07/19 by C. S. Liu, W. C. Wu · 13 citations
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Cuprate #Doping #Electron #Electron pair #Function (biology) #Hubbard model #Magnetism in coordination complexes #Mathematics #Monotonic function #Order (exchange) #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Superconductivity #Symmetry (geometry) #cond-mat.str-el #cond-mat.supr-con #t-J model

paper · pdf · doi:10.1103/physrevb.76.014513

published in Physical Review B 76(1) (American Physical Society) · 5 RevTeX4 pages, 2 EPS figures

openalex publication_date 2007/07/19 · arxiv created 2007/07/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

An antiferromagnetic (AF) spin fluctuation induced pairing model is proposed for the electron-doped cuprate superconductors. It suggests that, similar to the hole-doped side, the superconducting gap function is monotonic d_x²\ensuremath-y² wave and explains why the observed gap function has a nonmonotonic d_x²\ensuremath-y²-wave behavior when an AF order is taken into account. Dynamical spin susceptibility is calculated and shown to be in good agreement with the experiment. This gives a strong support to the proposed model.

Citations

• Nonmonotonic gap in the coexisting antiferromagnetic and superconducting states of electron-doped cuprate superconductors
• Superfluid Response in Electron-Doped Cuprate Superconductors
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t′-t″-J model