Resonance in Optimally Electron-Doped Superconductor Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_{4-\delta }$

Abstract

We use inelastic neutron scattering to probe magnetic excitations of an optimally electron-doped superconductor Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_{4-\delta }$ above and below its superconducting transition temperature $T_c=25$ K. In addition to gradually opening a spin pseudo gap at the antiferromagnetic ordering wavevector $\mathbf{Q}=(1/2,1/2,0)$, the effect of superconductivity is to form a resonance centered also at $\mathbf{Q}=(1/2,1/2,0)$ but at energies above the spin pseudo gap. The intensity of the resonance develops like a superconducting order parameter, similar to those for hole-doped superconductors and electron-doped Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_4$. The resonance is therefore a general phenomenon of cuprate superconductors, and must be fundamental to the mechanism of high-$T_c$ superconductivity.

Figure 4 typo corrected

References in corpus (4)

• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Resonance in the electron-doped high-Tc superconductor Pr0.88LaCe0.12CuO(4-delta)
• Magnetic Excitations and their energy change available to Superconducting Condensation in Optimally Doped YBa${}_2$Cu${}_3$O${}_{6.95}$
• Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d

Cited by in corpus (8)

• Three-dimensional Resonance in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• A distinct bosonic mode in an electron-doped high-transition-temperature superconductor
• Angle-resolved photoemission spectroscopy of electron-doped cuprate superconductors: Isotropic electron-phonon coupling
• Quantum Spin Excitations through the metal-to-insulator crossover in $YB{a}_{2}C{u}_3{O}_{6+y}$
• Analysis of the spectral function of Nd1.85Ce0.15CuO4, obtained by angle resolved photoemission spectroscopy
• Doping and energy evolution of spin dynamics in the electron-doped cuprate superconductor Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_{4-\delta }$
• Bound state of 4$f$-excitation and magnetic resonance in unconventional superconductors
• Effect of spin excitations on the property of quasiparticles in electron-doped cuprates