National Key Research and Development Program of China [2016YFA0300304]; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [11274044, 11574032]; NSFCNational Natural Science Foundation of China (NSFC) [11547034]; Science Foundation of Hengyang Normal University [13B44]; Hunan Provincial Natural Science Foundation of ChinaNatural Science Foundation of Hunan Province [2015JJ3027]
机构署名：
本校为其他机构
院系归属：
物理与电子工程学院
摘要：
Superconductivity in copper oxides emerges on doping holes or electrons into their Mott-insulating parent compounds. The spin excitations are thought to be the mediating glue for the pairing in superconductivity. Here the momentum and doping dependence of the dynamical spin response in the electron-doped cuprate superconductors is studied based on the kinetic-energy-driven superconducting mechanism. It is shown that the dispersion of the low-energy spin excitations changes strongly upon electron doping;however, the hour-glass-shaped dispersion of the low-energy spin excitations appeared in the...
