Soliton lattice in pure and diluted CuGeO3
Soliton lattice in pure and diluted CuGeO3
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DOI：
10.1103/physrevlett.76.4608
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发表时间：
1996-06-10
影响因子：
8.6
通讯作者：
Vigliante, A
中科院分区：
文献类型：
--
作者：
Kiryukhin, V;Keimer, B;Vigliante, A
我们报道了一项对自旋 - 派尔斯化合物CuGeO₃在高达13 T的磁场中磁场诱导的非公度相的同步辐射X射线散射研究。通过测量非公度布拉格反射的一次和三次谐波随磁场的变化，我们表明晶格调制具有孤子晶格的形式。孤子半宽度为13.6个晶格间距，大得惊人。用自旋为0（锌）和自旋为1（镍）的杂质稀释CuO₂自旋 - 1/2链，会导致一种短程有序的非公度态，其各向异性关联长度与平均杂质间距相当。
We report a synchrotron x-ray scattering study of the magnetic-field-induced incommensurate phase of the spin-Peierls compound CuGeO3, in magnetic fields up to 13 T. By measuring first and third harmonics of the incommensurate Bragg reflections as a function of field we show that the lattice modulation has the form of a soliton lattice. The soliton half-width, 13.6 lattice spacings, is surprisingly large. Dilution of the CuO2 spin-1/2 chains with spin-0 (Zn) and spin-1 (Ni) impurities results in a short-range-ordered incommensurate state with an anisotropic correlation length comparable to the average impurity separation.