High-Energy Spin Excitations in the Electron-Doped Superconductor Pr{sub 0.88}LaCe{sub 0.12}CuO{sub 4-{delta}} with T{sub c}=21 K
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
- Center for Neutron Scattering, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (United States)
- ISIS Facility, Rutherford Appleton Laboratory, Oxon OX11 0QX (United Kingdom)
- Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511 (Japan)
We use high-resolution inelastic neutron scattering to study the low-temperature magnetic excitations of the electron-doping superconductor Pr{sub 0.88}LaCe{sub 0.12}CuO{sub 4-{delta}} (T{sub c}=21{+-}1 K) over a wide energy range (4 meV{<=}({Dirac_h}/2{pi}){omega}{<=}330 meV). The effect of electron doping is to cause a wave vector (Q) broadening in the low-energy (({Dirac_h}/2{pi}){omega}{<=}80 meV) commensurate spin fluctuations at (0.5, 0.5) and to suppress the intensity of spin-wave-like excitations at high energies (({Dirac_h}/2{pi}){omega}{>=}100 meV). This leads to a substantial redistribution in the spectrum of the local dynamical spin susceptibility {chi}{sup ''}({omega}), and reveals a new energy scale similar to that of the lightly hole-doped YB{sub 2}Cu{sub 3}O{sub 6.353} (T{sub c}=18 K)
- OSTI ID:
- 20777157
- Journal Information:
- Physical Review Letters, Vol. 96, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.96.157001; (c) 2006 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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