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arXiv 0909.5387cond-mat.supr-con
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超导体La(1.875)Ba(0.125)CuO高压相中电荷条纹自发对称性破缺缺(4)

Spontaneous symmetry breaking by charge stripes in the high-pressure phase of superconducting La(1.875)Ba(0.125)CuO(4)

M. Huecker, M. v. Zimmermann, M. Debessai, J. S. Schilling, J. M. Tranquada, G. D. Gu

摘要:

在这些情况下,已观察到在铜酸盐的电荷条纹顺序,晶体结构是这样的,CuO 2平面的平均旋转对称性从四倍减少到两倍。因此,人们可以认为,约化的晶格对称性是条纹序存在的必要条件。我们利用压力恢复了La(1.875)Ba(0.125)CuO(4)单晶的平均四重对称性,并通过X射线衍射表明电荷条纹有序仍然存在。因此,电子驱动的条纹顺序可以自发地打破晶格对称性。

英文摘要:

In those cases where charge stripe order has been observed in cuprates, the crystal structure is such that the average rotational symmetry of the CuO2 planes is reduced from four-fold to two-fold. As a result, one could argue that the reduced lattice symmetry is essential to the existence of stripe order. We use pressure to restore the average four-fold symmetry in a single crystal of La(1.875)Ba(0.125)CuO(4), and show by x-ray diffraction that charge stripe order still occurs. Thus, electronically-driven stripe order can spontaneously break the lattice symmetry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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