Resonance in Optimally Electron-Doped Superconductor Nd_1.85Ce_0.15CuO_4−?

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.99.017001· OSTI ID:958781

Zhao, Jun ^[1]; Dai, Pengcheng ^[1]; Li, Shiliang ^[2]; Freeman, Paul G. ^[3]; Tokura, Y. ^[4]

---

1. ORNL
2. University of Tennessee, Knoxville (UTK)
3. Institut Laue-Langevin (ILL)
4. University of Tokyo, Tokyo, Japan

We use inelastic neutron scattering to probe magnetic excitations of an optimally electron-doped superconductor Nd1.85Ce0.15CuO4− above and below its superconducting transition temperature Tc = 25 K. In addition to gradually opening a spin pseudo gap at the antiferromagnetic ordering wavevector 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 pseudo gap. The intensity of the resonance develops like a superconducting order parameter, similar to those for hole-doped superconductors and electron-doped Pr0.88LaCe0.12CuO4. The resonance is therefore a general phenomenon of cuprate superconductors, and must be fundamental to the mechanism of high-Tc superconductivity.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Flux Isotope Reactor
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 958781
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERIUM OXIDES
COPPER OXIDES
CUPRATES
Electron-Doped
MESONS
NEODYMIUM OXIDES
NEUTRONS
Nd1.85Ce0.15CuO4−
ORDER PARAMETERS
RESONANCE
Resonance
SCATTERING
SPIN
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION TEMPERATURE