论文标题
条纹的晶体对称性订购LA1.88SR0.12CUO4
Crystal Symmetry of Stripe Ordered La1.88Sr0.12CuO4
论文作者
论文摘要
我们提供了条纹有序超导体\ lscox {0.12}的X射线和中子衍射研究。平均晶体结构与文献中通常报道的正交$ BMAB $太空群是一致的。然而，这种结构并不与二阶相变为条纹顺序阶段的对称性兼容，并且正如我们在这里报告的$ BMAB $空间组中禁止的许多Bragg峰。我们已经研究并分析了这些$ bmab $ - forbidding bragg的反思。衍射强度的拟合产生与电荷条纹顺序一致的对称性的单斜晶格失真。
We present a combined x-ray and neutron diffraction study of the stripe ordered superconductor \lscox{0.12}. The average crystal structure is consistent with the orthorhombic $Bmab$ space group as commonly reported in the literature. This structure however is not symmetry compatible with a second order phase transition into the stripe order phase, and, as we report here numerous Bragg peaks forbidden in the $Bmab$ space group are observed. We have studied and analysed these $Bmab$-forbidden Bragg reflections. Fitting of the diffraction intensities yields monoclinic lattice distortions that are symmetry consistent with charge stripe order.
