TY - JOUR
T1 - Spins and carriers in oxide superconductors studied by raman scattering
AU - Sugai, S.
AU - Sato, M.
AU - Ito, T.
AU - Ido, T.
AU - Takagi, H.
AU - Uchida, S.
AU - Kobayashi, T.
AU - Akimitsu, J.
AU - Hidaka, Y.
AU - Murakami, T.
AU - Hosoya, S.
AU - Kajitani, T.
AU - Fukuda, T.
PY - 1990
Y1 - 1990
N2 - The spin and doped charge states in copper oxide superconductors were investigated by Raman spectroscopy. The anomalous magnon scattering in the antiferromagnetic insulator phases, such as the second peaks near 4J (J is the two-spin superexchange energy) in the B1g spectra and the large scattering intensities in the A1g spectra, suggests the existence of four-spin cyclic exchange interactions. When carriers are doped, the A1g spectra show non-“normal Fermi liquid” behavior. The imaginary part of the experimentally obtained susceptibility have ω-proportional part from ω~0. The gradient increases, on cooling, as in the case of the marginal Fermi liquid.
AB - The spin and doped charge states in copper oxide superconductors were investigated by Raman spectroscopy. The anomalous magnon scattering in the antiferromagnetic insulator phases, such as the second peaks near 4J (J is the two-spin superexchange energy) in the B1g spectra and the large scattering intensities in the A1g spectra, suggests the existence of four-spin cyclic exchange interactions. When carriers are doped, the A1g spectra show non-“normal Fermi liquid” behavior. The imaginary part of the experimentally obtained susceptibility have ω-proportional part from ω~0. The gradient increases, on cooling, as in the case of the marginal Fermi liquid.
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U2 - 10.1016/S0921-4526(09)80217-2
DO - 10.1016/S0921-4526(09)80217-2
M3 - Article
AN - SCOPUS:0025466322
VL - 165-166
SP - 1263
EP - 1264
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -