A dynamical mean-field study of rare-earth nickelates

International Conference on Strongly Correlated Electron Systems 2014

Misra, D.^1 ; Vidhyadhiraja, N.S.^2 ; Taraphder, A.^1,3

Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, India^1

Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India^2

Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur, India^3

关键词: Antiferromagnetic insulators;    Dynamical mean-field theory;    Effective mass;    High temperature;    Low temperatures;    Mean field;    Nickelates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012060/pdf
DOI  :  10.1088/1742-6596/592/1/012060

来源: IOP

【 摘 要 】

Most of the rare-earth Nickelates (RNiO3; R= Nd, Pr, Sm etc.) exhibit a sharp metal- insulator transition, from a high temperature paramagnetic metal to a low temperature antiferromagnetic insulator. LaNiO3, the first member of the series, is the only exception in the RNiO3family, which remains metallic down to low temperatures. Using local density approximation as an input to dynamical mean-field theory, we study the transport properties of both LaNiO3and NdNiO3, and show that LaNiO3remains a correlated Fermi liquid with an effective mass enhancement as the correlation increases upto the bandwidth. We also suggest the possibility of pressure and strain-driven metal-insulator transition in both the Nickelate compounds.