First-principles calculations and a model consideration of magnetically frustrated layered material ${\mathrm{PdCrO}}_2$ are performed. The results on the exchange parameters are in agreement with the experimental data on the Curie-Weiss temperature ($\theta$). We show that experimentally observed strong suppression of the Néel temperature ($T_N$) in comparison with the Curie-Weiss temperature is due to three main factors. First, as expected, this is connected with the layered structure and relatively small exchange interaction along the $c$ axis. Second, deformation of the ideal in-plane ${120}^{\circ }$ magnetic structure is crucial to provide finite $T_N$ value. However, these two factors are still insufficient to explain low $T_N$ and the large frustration factor $\left|\theta \right|/T_N$. Thus, we suggest a scenario of an exotic non-Fermi-liquid state in ${\mathrm{PdCrO}}_2$ above $T_N$ within the frameworks of the Anderson lattice model, which seems to explain qualitatively all its main peculiarities.

中文翻译：

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失意分层系统中的非常规磁性和电子态PdCrO2

磁阻分层材料的第一性原理计算和模型考虑 ${\mathrm{钯铬}}_2$执行。交换参数的结果与居里-魏斯温度（$\theta$）。我们证明了实验观察到的Néel温度的强烈抑制（${Ť}_{ñ}$）与居里-魏斯温度相比是由于三个主要因素。首先，正如预期的那样，它与分层结构以及沿$C$轴。二，理想面内变形${120}^{\circ }$ 磁性结构对于提供有限的空间至关重要 ${Ť}_{ñ}$值。然而，这两个因素仍不足以解释低${Ť}_{ñ}$ 和大挫败因素 $\left|\theta \right|/{Ť}_{ñ}$。因此，我们提出了一种外来非费米液体状态的场景${\mathrm{钯铬}}_2$ 以上 ${Ť}_{ñ}$ 在安德森格子模型的框架内，这似乎从质上解释了其所有主要特征。