TY - JOUR
T1 - Neutron-scattering study on spin fluctuations in high-temperature-tetragonal phase of La1.70 Sr0.24 Ce0.06 CuO4
AU - Enoki, M.
AU - Fujita, M.
AU - Yamada, K.
N1 - Funding Information:
This work was supported in part by a Grant-In-Aid for Young Scientists A (17684016) and a Grant-in-Aid from the Japanese Ministry of Education, Culture, Sports, Science and Technology.
PY - 2007/11
Y1 - 2007/11
N2 - We investigated spin fluctuations in the high-temperature-tetragonal phase of La1.70 Sr0.24 Ce0.06 CuO4. At 8 K, well-defined incommensurate spin fluctuations were observed for ω ≥ 4 meV, while no clear signal was observed at 2 meV, indicating an opening of spin gap. At ω = 7 meV, the peak-sharpening in momentum was observed in the superconducting state and the peak-intensity increases below Tc upon cooling. These results are quantitatively similar to those observed for the low-temperature-orthorhombic phase of optimarlly and slightly overdoped La2 - x Srx CuO4 (LSCO), suggesting the reduction of hole concentration by Ce doping and no distinct effect from the lattice distortion on the spin fluctuations in the optimally doped LSCO.
AB - We investigated spin fluctuations in the high-temperature-tetragonal phase of La1.70 Sr0.24 Ce0.06 CuO4. At 8 K, well-defined incommensurate spin fluctuations were observed for ω ≥ 4 meV, while no clear signal was observed at 2 meV, indicating an opening of spin gap. At ω = 7 meV, the peak-sharpening in momentum was observed in the superconducting state and the peak-intensity increases below Tc upon cooling. These results are quantitatively similar to those observed for the low-temperature-orthorhombic phase of optimarlly and slightly overdoped La2 - x Srx CuO4 (LSCO), suggesting the reduction of hole concentration by Ce doping and no distinct effect from the lattice distortion on the spin fluctuations in the optimally doped LSCO.
KW - C. Neutron scattering
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U2 - 10.1016/j.jpcs.2007.08.032
DO - 10.1016/j.jpcs.2007.08.032
M3 - Article
AN - SCOPUS:35748978222
SN - 0022-3697
VL - 68
SP - 2111
EP - 2114
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 11
ER -