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Title: Resonance in Optimally Electron-Doped Superconductor Nd 1.85Ce 0.15CuO 4−?

Abstract

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.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5]
  1. ORNL
  2. University of Tennessee, Knoxville (UTK)
  3. Institut Laue-Langevin (ILL)
  4. Spin Superstructure Project, ERATO, Japan Science and Technology, Tsukuba 305-85
  5. University of Tokyo, Tokyo, Japan
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
958781
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 99
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERIUM OXIDES; COPPER OXIDES; CUPRATES; MESONS; NEODYMIUM OXIDES; NEUTRONS; ORDER PARAMETERS; RESONANCE; SCATTERING; SPIN; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TRANSITION TEMPERATURE; Resonance; Electron-Doped; Nd1.85Ce0.15CuO4−

Citation Formats

Zhao, Jun, Dai, Pengcheng, Li, Shiliang, Freeman, Paul G., Onose, Y,., and Tokura, Y.. Resonance in Optimally Electron-Doped Superconductor Nd1.85Ce0.15CuO4−?. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.99.017001.
Zhao, Jun, Dai, Pengcheng, Li, Shiliang, Freeman, Paul G., Onose, Y,., & Tokura, Y.. Resonance in Optimally Electron-Doped Superconductor Nd1.85Ce0.15CuO4−?. United States. doi:10.1103/PhysRevLett.99.017001.
Zhao, Jun, Dai, Pengcheng, Li, Shiliang, Freeman, Paul G., Onose, Y,., and Tokura, Y.. Mon . "Resonance in Optimally Electron-Doped Superconductor Nd1.85Ce0.15CuO4−?". United States. doi:10.1103/PhysRevLett.99.017001.
@article{osti_958781,
title = {Resonance in Optimally Electron-Doped Superconductor Nd1.85Ce0.15CuO4−?},
author = {Zhao, Jun and Dai, Pengcheng and Li, Shiliang and Freeman, Paul G. and Onose, Y,. and Tokura, Y.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.99.017001},
journal = {Physical Review Letters},
number = ,
volume = 99,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}