Neutron-Spin Resonance in the Optimally Electron-Doped Superconductor Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4-{delta}}

Journal Article · Fri Jul 06 04:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.017001· OSTI ID:20957858

Jun, Zhao; Shiliang, Li ^[1]; Pengcheng, Dai ^[1]; Freeman, Paul G ^[2]; Onose, Y ^[3]; Tokura, Y ^[3]

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1. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
2. Institut Laue-Langevin, 6, rue Jules Horowitz, BP156-38042 Grenoble Cedex 9 (France)
3. 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, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
CERIUM COMPOUNDS
CUPRATES
DOPED MATERIALS
ELECTRONS
HOLES
INELASTIC SCATTERING
NEODYMIUM COMPOUNDS
NEUTRON DIFFRACTION
NEUTRON REACTIONS
NEUTRONS
ORDER PARAMETERS
RESONANCE
SPIN
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION TEMPERATURE