论文标题
原型无限层稀土的相关 - 温度相图
Correlation-temperature phase diagram of prototypical infinite layer rare earth nickelates
论文作者
论文摘要
在孔掺杂无限层的镍液中，RNIO2（r = nd，pr，la）发现了超导性。尚未出现低能量多体状态的明确情况。我们根据嵌入式动力学均值场理论计算，对低能物理学提供新的见解，并提出相关性（U） - 温度（t）相图。关键特征是在狭窄的U-T区域中的低T费米液体（FL）相，高t居里 - 韦斯机制和抗铁磁相。我们将FL阶段的发作与NI-D力矩的部分筛选相关联；但是，在较低的温度下进行全面筛查。这可能与传导电子的不足有关以有效筛选Ni-D矩，这暗示了Nozieres耗尽原则。我们的结果表明，RNIO2处于顺磁性状态，接近抗铁磁圆顶，使磁波动可行。这可能是超导性的结果。
The discovery of superconductivity in hole-doped infinite layer nickelates, RNiO2 (R = Nd, Pr, La) has garnered sustained interest in the field. A definitive picture of low-energy many-body states has not yet emerged. We provide new insights into the low-energy physics, based on our embedded dynamical mean-field theory calculations, and propose a correlation (U)-temperature (T) phase diagram. The key features are a low-T Fermi liquid (FL) phase, a high-T Curie-Weiss regime, and an antiferromagnetic phase in a narrow U-T region. We associate the onset of the FL phase with partial screening of Ni-d moments; however, full screening occurs at lower temperatures. This may be related to insufficiency of conduction electrons to effectively screen the Ni-d moments, suggestive of Nozieres Exhaustion Principle. Our results suggest that RNiO2 are in the paramagnetic state, close to an antiferromagnetic dome, making magnetic fluctuations feasible. This may be consequential for superconductivity.
