Neutron-Spin Resonance in the Optimally Electron-Doped Superconductor Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4-{delta}}
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
- Institut Laue-Langevin, 6, rue Jules Horowitz, BP156-38042 Grenoble Cedex 9 (France)
- Spin Superstructure Project, ERATO, Japan Science and Technology, Tsukuba 305-8562 (Japan)
We use inelastic neutron scattering to probe magnetic excitations of an optimally electron-doped superconductor Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4-{delta}} above and below its superconducting transition temperature T{sub c}=25 K. In addition to gradually opening a spin pseudogap at the antiferromagnetic ordering wave vector Q=(1/2,1/2,0), the effect of superconductivity is to form a resonance centered also at Q=(1/2,1/2,0) but at energies above the spin pseudogap. The intensity of the resonance develops like a superconducting order parameter, similar to those for hole-doped superconductors and electron-doped Pr{sub 0.88}LaCe{sub 0.12}CuO{sub 4}. The resonance is therefore a general phenomenon of cuprate superconductors, and must be fundamental to the mechanism of high-T{sub c} superconductivity.
- OSTI ID:
- 20957858
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.99.017001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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