论文标题
通过Elasto-X射线衍射探测的列非相变跨的传输结构对应关系
The transport-structural correspondence across the nematic phase transition probed by elasto-x-ray diffraction
论文作者
论文摘要
铁质质材料中的电子非神经性与晶格和导电电子均耦合，这允许结构和传输可观察物探测概念的波动和顺序参数。在这里，我们将同时传输和X射线衍射测量与原位可调节应变（Elasto-XRD）结合在一起，以测量剪切模量和弹性透明度的温度依赖性，而弹性曲线及弹性过渡和自发性正交和电阻率和电阻率和电阻率和电阻率和电阻率偏置下方，均在单个单个单个单个样本中。 $ ba（fe_ {0.96} co_ {0.04}）_ {2} as_ {2} $。在74 K范围内，运输与结构量的比率几乎不依赖于温度，并且在有序相和无序相之间达成一致。这些结果表明，Elasto-XRD是一种探测Nemato弹性和Nemato-Nemato-Transport耦合的强大技术，它们对附近的超导性具有重要意义。它还可以在较大的应变极限下进行测量，其中平均场描述的分解揭示了列的交织性质。
Electronic nematicity in iron pnictide materials is coupled to both the lattice and the conducting electrons, which allows both structural and transport observables to probe nematic fluctuations and the order parameter. Here we combine simultaneous transport and x-ray diffraction measurements with in-situ tunable strain (elasto-XRD) to measure the temperature dependence of the shear modulus and elastoresistivity above the nematic transition and the spontaneous orthorhombicity and resistivity anisotropy below the nematic transition, all within a single sample of $Ba(Fe_{0.96}Co_{0.04})_{2} As_{2}$. The ratio of transport to structural quantities is nearly temperature-independent over a 74 K range and agrees between the ordered and disordered phases. These results show that elasto-XRD is a powerful technique to probe the nemato-elastic and nemato-transport couplings, which have important implications to the nearby superconductivity. It also enables the measurement in the large strain limit, where the breakdown of mean field description reveals the intertwined nature of nematicity.
