Fujita M, Goka H, Yamada K, Matsuda M
Institute for Chemical Research, Kyoto University, Gokasho, Uji 610-0011, Japan.
Phys Rev Lett. 2002 Apr 22;88(16):167008. doi: 10.1103/PhysRevLett.88.167008. Epub 2002 Apr 9.
We have performed a series of elastic neutron scattering measurements on 1/8-hole doped La(1.875)-Ba(0.125-x)Sr(x)CuO(4) single crystals with x = 0.05, 0.06, 0.075, and 0.085. Both charge-density-wave (CDW) and spin-density-wave orders are found to develop simultaneously below the structural transition temperature between the low-temperature orthorhombic (LTO) and low-temperature tetragonal (LTT) or low-temperature less-orthorhombic (LTLO) phases. In the ground state the CDW order is observed only in the LTT/LTLO phase and drastically degrades towards the LTO boundary. The x dependence of T(c) strongly suggests a direct effect of the CDW order on the suppression of superconductivity.
我们对x = 0.05、0.06、0.075和0.085的1/8空穴掺杂La(1.875)-Ba(0.125 - x)Sr(x)CuO(4)单晶进行了一系列弹性中子散射测量。发现在低温正交（LTO）和低温四方（LTT）或低温低正交（LTLO）相之间的结构转变温度以下，电荷密度波（CDW）和自旋密度波序同时出现。在基态下，仅在LTT/LTLO相中观察到CDW序，并且朝着LTO边界急剧退化。T(c)的x依赖性强烈表明CDW序对超导性抑制有直接影响。
