Competition between charge- and spin-density-wave order and superconductivity in La1.875Ba0.125-xSrxCuO4 -: art. no. 167008
Competition between charge- and spin-density-wave order and superconductivity in La1.875Ba0.125-xSrxCuO4 -: art. no. 167008
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DOI：
10.1103/physrevlett.88.167008
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发表时间：
2002-04-22
影响因子：
8.6
通讯作者：
Matsuda, M
中科院分区：
文献类型：
--
作者：
Fujita, M;Goka, H;Matsuda, M
我们对x=1.875，0.06，0.075和0.085的1/8空穴掺杂La-1.875-Ba0.125-xSrxCuO4单晶进行了一系列的弹性中子散射测量。在低温正交相(LTO)和低温四方相(LTT)或低温次正交相(LTLO)之间的结构转变温度以下，发现电荷密度波(CDW)和自旋密度波有序同时发展。在基态，CDW有序只在LTT/LTLO相观察到，并且向LTO边界急剧退化。T-c的x依赖关系强烈地表明了CDW有序对超导电性抑制的直接影响。
We have performed a series of elastic neutron scattering measurements on 1/8-hole doped La-1.875-Ba0.125-xSrxCuO4 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.