Observation of incommensurate magnetic correlations at the lower critical concentration for superconductivity inLa2−xSrxCuO4(x=0.05)
作者： K. Yamada , R. J. Birgeneau , M. A. Kastner , Y. S. Lee , P. M. Gehring
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摘要: Neutron-scattering experiments have been performed on lightly-doped La(2-x)Sr(x)CuO4 single crystals in both the insulating (x=0.03,0.04,0.05) and superconducting (x=0.06) regions. Elastic magnetic peaks are observed at low temperatures all samples with maximum peak linewidth occuring critical concentration x_c=0.05. New incommensurate only x=0.05, positions of which rotated by 45 degrees reciprocal space about (pi,pi) from those for x>=0.06 phase.
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