论文标题
UTE $ _2 $的电阻率中电子相关性的各向异性签名
Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe$_2$
论文作者
论文摘要
怀疑多个非常规的超导阶段是由重毛绒paramagnet ute $ _2 $中的磁波动驱动的，而挑战是确定电子相关性的签名，包括磁性波动，在整体物理量中。在这里，对于不同的电流和磁场构型，我们在强烈的磁场下彻底研究UTE $ _2 $的电阻率的各向异性。提取了两个特征温度和各向异性的低温费米 - 流体状系数$ a $，由电子相关控制。它们在$μ_0H_M\ simeq35 $ 〜T诱发的元磁过渡附近的关键行为，用于$ \ Mathbf {H} \ Parallel \ Mathbf {B} $。各向异性散射过程被证明，并提出磁波动通过伴有杂交对电阻率有助于。我们的工作吸引了对电阻率的各向异性贡献的微观建模，这是理解UTE $ _2 $中磁介导的超导性的里程碑。
Multiple unconventional superconducting phases are suspected to be driven by magnetic fluctuations in the heavy-fermion paramagnet UTe$_2$, and a challenge is to identify the signatures of the electronic correlations, including the magnetic fluctuations, in the bulk physical quantities. Here, we investigate thoroughly the anisotropy of the electrical resistivity of UTe$_2$ under intense magnetic fields up to 70~T, for different electrical-current and magnetic-field configurations. Two characteristic temperatures and an anisotropic low-temperature Fermi-liquid-like coefficient $A$, controlled by the electronic correlations, are extracted. Their critical behavior near the metamagnetic transition induced at $μ_0H_m\simeq35$~T for $\mathbf{H}\parallel\mathbf{b}$ is characterized. Anisotropic scattering processes are evidenced and magnetic fluctuations are proposed to contribute, via a Kondo hybridization, to the electrical resistivity. Our work appeals for a microscopic modeling of the anisotropic contributions to the electrical resistivity as a milestone for understanding magnetically-mediated superconductivity in UTe$_2$.
