Magnetic field dependence of charge stripe order in La 2 − x Ba x Cu O 4 ( x ≈ 1 8 )
Magnetic field dependence of charge stripe order in La 2 − x Ba x Cu O 4 ( x ≈ 1 8 )
复制标题
La 2 − x Ba x Cu O 4 ( x ≈ 1 8 ) 中电荷条带顺序的磁场依赖性
DOI：
10.1103/physrevb.77.180513
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发表时间：
2007
影响因子：
3.7
通讯作者：
Young
中科院分区：
文献类型：
--
作者：
Jungho Kim;A. Kagedan;G. Gu;C. Nelson;T. Gog;D. Casa;Young
我们利用高分辨率 X 射线散射对 ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Ba}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$ $(x\ensuremath{\approx}\frac{1}{8})$ 中电荷排序的磁场依赖性进行了详细研究。我们发现，当在超导相 $(T=2\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ 中施加大于 $\ensuremath{\sim}5\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ 的磁场时，电荷级相关长度会增加。观察到的电荷序相关长度的异常场依赖性表明，静电荷条带序与该样本中的超导基态竞争。
We have carried out a detailed investigation of the magnetic field dependence of charge ordering in ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Ba}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$ $(x\ensuremath{\approx}\frac{1}{8})$ by utilizing high-resolution x-ray scattering. We find that the charge order correlation length increases as a magnetic field greater than $\ensuremath{\sim}5\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ is applied in the superconducting phase $(T=2\phantom{\rule{0.3em}{0ex}}\mathrm{K})$. The observed unusual field dependence of the charge order correlation length suggests that the static charge stripe order competes with the superconducting ground state in this sample.