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arXiv 2203.00558cond-mat.supr-concond-mat.mtrl-sci
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中子散射研究 La$_{1.885}$Ba$_{0.115}$CuO$_4$ 中单轴应力下磁条纹的演化

Evolution of magnetic stripes under uniaxial stress in La$_{1.885}$Ba$_{0.115}$CuO$_4$ studied by neutron scattering

Machteld E. Kamminga, Kristine M. L. Krighaar, Astrid T. Rømer, Lise Ø. Sandberg, Pascale P. Deen, Martin Boehm, G. D. Gu, J. M. Tranquada, Kim Lefmann

AI总结:

利用中子散射研究 La$_{1.885}$Ba$_{0.115}$CuO$_4$,发现单轴应力抑制静态磁条纹并使涨落动量移向 1/8 公度值,揭示超导与静态磁性的权衡。

摘要:

我们在此展示单轴应力对铜氧化物体系 La$_{2-x}$Ba$_x$CuO$_4$($x=0.115$)中磁条纹的影响;此前已发现该体系的超导转变温度会在应力诱导下升高。借助中子散射,我们表明静态条纹受到应力抑制,表明超导与静态磁性之间存在权衡,这与此前报道的 μSR 测量结果直接一致。此外,我们表明弹性通道中减少的部分权重似乎转移到了非弹性通道。而且,观测到涨落的动量在应力诱导下向典型的 1/8 公度值移动。这些结果对铜氧化物体系中应力增强超导的理论解释施加了强有力的约束。

英文摘要:

Here we present the effect of uniaxial stress on the magnetic stripes in the cuprate system La$_{2-x}$Ba$_{x}$CuO$_4$ with $x = 0.115$, previously found to have a stress-induced enhancement in the superconducting transition temperature. By means of neutron scattering, we show that the static stripes are suppressed by stress, pointing towards a trade-off between superconductivity and static magnetism, in direct agreement with previously reported $μ$SR measurements. Additionally, we show that some of the reduced weight in the elastic channel appears to have moved to the inelastic channel. Moreover, a stress-induced momentum shift of the fluctuations towards the typical 1/8 value of commensurability is observed. These results impose a strong constraint on the theoretical interpretation of stress-enhanced superconductivity in cuprate systems.

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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