TY - JOUR
T1 - Static and dynamic spin correlations in the spin-glass phase of slightly doped La2-xSrxCuO4
AU - Matsuda, M.
AU - Fujita, M.
AU - Yamada, K.
AU - Birgeneau, R. J.
AU - Kastner, M. A.
AU - Hiraka, H.
AU - Endoh, Y.
AU - Wakimoto, S.
AU - Shirane, G.
PY - 2000/10/1
Y1 - 2000/10/1
N2 - Neutron-scattering experiments reveal that a diagonal spin modulation, which is a one-dimensional modulation rotated away by 45° from that in the superconducting phase, occurs universally across the insulating spin-glass phase in La2-xSrxCuO4 (0.02≤x≤0.055). This establishes an intimate relation between the magnetism and the transport properties in the high-temperature copper oxide superconductors. Furthermore, it is found that the charge density per unit length estimated using a charge stripe model is almost constant throughout the phase diagram, even when the modulation rotates away by 45° at the superconducting boundary. However, at the lowest values for x the density changes approaching 1 hole/Cu as in La2-xSrxNiO4. Magnetic excitation spectra suggest that magnetic correlations change from incommensurate to commensurate at ω ∼7 meV and T∼70 K, indicating a characteristic energy for the incommensurate structure of 6-7 meV.
AB - Neutron-scattering experiments reveal that a diagonal spin modulation, which is a one-dimensional modulation rotated away by 45° from that in the superconducting phase, occurs universally across the insulating spin-glass phase in La2-xSrxCuO4 (0.02≤x≤0.055). This establishes an intimate relation between the magnetism and the transport properties in the high-temperature copper oxide superconductors. Furthermore, it is found that the charge density per unit length estimated using a charge stripe model is almost constant throughout the phase diagram, even when the modulation rotates away by 45° at the superconducting boundary. However, at the lowest values for x the density changes approaching 1 hole/Cu as in La2-xSrxNiO4. Magnetic excitation spectra suggest that magnetic correlations change from incommensurate to commensurate at ω ∼7 meV and T∼70 K, indicating a characteristic energy for the incommensurate structure of 6-7 meV.
UR - http://www.scopus.com/inward/record.url?scp=0034289727&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.62.9148
DO - 10.1103/PhysRevB.62.9148
M3 - Article
AN - SCOPUS:0034289727
SN - 0163-1829
VL - 62
SP - 9148
EP - 9154
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 13
ER -