1. Open Access Kent State
  2. Correlation-temperature phase diagram of prototypical infinite layer rare earth nickelates
Author(s)
Abstract

The discovery of superconductivity in hole-doped infinite layer nickelates, RNiO2 (R = Nd, Pr, La) has resulted in sustained interest in the field. A definitive picture of low-energy many-body states has not yet emerged. Here we provide 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.
Format
Article
Identifier(s)
10.1038/s42005-023-01163-7
Publication Date
2023-03-15
Publication Title
Communications Physics
Publisher
Springer Nature
Volume
6
Issue
1
Subject
Rights
http://rightsstatements.org/vocab/InC/1.0/
https://www.nature.com/commsphys/open-access
License
Creative Commons Attribution 4.0
Community
Department of Physics
Permalink https://oaks.kent.edu/article/correlation-temperature-phase-diagram-prototypical-infinite-layer-rare-earth-nickelates
Pascut, G., Cosovanu, L., Haule, K., & Quader, K. (2023). Correlation-temperature phase diagram of prototypical infinite layer rare earth nickelates (1–). Communications Physics. https://doi.org/10.1038/s42005-023-01163-7
Pascut, Gheorghe, Lucian Cosovanu, Kristjan Haule, and Khandker Quader. 2023. “Correlation-Temperature Phase Diagram of Prototypical Infinite Layer Rare Earth Nickelates”. Communications Physics. https://doi.org/10.1038/s42005-023-01163-7.
Pascut, Gheorghe, et al. Correlation-Temperature Phase Diagram of Prototypical Infinite Layer Rare Earth Nickelates. Communications Physics, 15 Mar. 2023, https://doi.org/10.1038/s42005-023-01163-7.