超导性、Kondo物理与磁序：通过3d和4f相关电子的相互作用调控La$_{1-x}$Ce$_x$FeSiH固溶体的基态
Superconductivity, Kondo physics and magnetic order: Tuning the groundstate in the La$_{1-x}$Ce$_x$FeSiH solid solution through the interplay between $3d$ and $4f$ correlated electrons
AI总结：
通过调控La$_{1-x}$Ce$_x$FeSiH固溶体中的铈含量，研究3d和4f相关电子的Kondo纠缠，揭示超导态与Kondo相干态的转变。
摘要：
我们报告了对La$_{1-x}$Ce$_x$FeSiH固溶体（0 ≤ x ≤ 1）的研究，这是一种具有ZrCuSiAs型结构的金属氢化物家族，空间群为P4/nmm。对于低浓度的铈（x ≤ 0.20），我们观察到超导性的存在，其起源于铁的关联3d电子。超导区域随着铈的取代逐渐被抑制。对于中等浓度的铈（0.07 ≤ x ≤ 0.50），我们观察到单离子Kondo效应的证据，且在2 K以下没有磁相变。对于0.07 ≤ x ≤ 0.20，单离子Kondo效应与低温下的超导基态共存。对于x > 0.50，我们观察到Kondo相干和低温下的重费米液体区域。最后，在高浓度的铈（x ≥ 0.85）下，我们观察到低温下的磁序特征。我们通过引入与超导性、Kondo效应和磁序相关的温度尺度，构建了一个丰富的相图（温度与铈含量x）。这表明，通过使用铈浓度x作为唯一控制参数，可以探索3d和4f相关电子之间的Kondo纠缠，这表明超导态（与3d电子相关）与Kondo相干态（涉及3d和4f电子）之间存在异常的变化。
英文摘要：
We report a study of the La$_{1-x}$Ce$_x$FeSiH solid solution ($0 \leq x \leq 1$), a family of intermetallic hydrides of ZrCuSiAs-type structure, with space group $P4/nmm$. For low cerium concentrations $x \leq 0.20$, we observe the presence of superconductivity, which originates from the correlated $3d$ electrons of iron. The superconducting regime is progressively suppressed by the cerium substitution. For moderate cerium concentration $0.07 \leq x \leq 0.50$, we observe evidence of the single-ion Kondo effect and no magnetic phase transition down to 2 K. For $0.07 \leq x \leq 0.20$, the single-ion Kondo effect coexists with a superconducting ground state at low temperatures. From $x > 0.50$, we observe signatures of Kondo coherence and a heavy Fermi liquid regime at low temperature. Finally, at high cerium concentration $x \geq 0.85$, we observe signatures of magnetic ordering at low temperatures. We discuss our results by introducing temperature scales related to superconductivity, the Kondo effect, and magnetic order, which permits building a rich phase diagram temperature versus cerium content $x$. This shows that using the cerium concentration $x$ as a unique control parameter, we can explore the Kondo entanglement between correlated $3d$ and $4f$ electrons, which suggests an unusual change between the superconducting state related to the $3d$ electrons and the Kondo coherent state involving both $3d$ and $4f$ electrons.
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。
