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Authors: Wenya Rowe*, Johannes Knolle**, Ilya Eremin***, Peter Hirschfeld* *Department of Physics, University of Florida, Gainesville, FL **Max-Planck-Institut für Physik komplexer System, D-01187 Dresden, Germany ***Institute für Theoretische Physik III, Ruhr-Universität Bochum, D-44801 Bochum, Germany Spin fluctuations are one of the most promising candidates for mediating superconducting pairs in high-temperature superconducting materials. We adapt a one-band Hubbard model in the pure spin density wave (SDW) state and in the coexistence state of SDW and superconductivity. By changing the chemical potential we study the evolution of the Fermi surfaces, SDW order parameter, and superconducting gap sizes with doping. The calculation of the transverse and longitudinal spin excitation spectrum in the coexistence phase of AF and d-wave superconductivity is motivated by the electron-doped cuprates. |
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