Andres CANO, Nickelate superconductors: infinite-layer materials and beyond

Andrés Cano, Intitut NEEL, CNRS, Grenoble

The recent discovery of unconventional superconductivity in the infinite-layer rare-earth nickelates RNiO2 has sparked a renewed interest in these systems [1,2]. The electronic properties of these systems display interesting analogies with the high-Tc cuprates and, at the same time, intriguing differences that deserve close attention. In this seminar I will provide a brief overview of the state-of-the-art and present some recent related to the ab inito description of correlations in these nickelates [3], distinct interfacial effects [4], and prospective materials [5].  

[1] Superconductivity in an infinite-layer nickelate, Li et al., Nature, 572 624 (2019).

[2] Nickelate superconductors: an ongoing dialog between theory and experiments, A.S. Botana, F. Bernardini and A. Cano, JETP 159, 711 (2021).

[3] Ab initio many-body GW correlations in the electronic structure of LaNiO2, V. Olevano, F. Bernardini, X. Blase, and A. Cano, Phys. Rev. B, 101, 161102(R) (2020).

[4] Stability and electronic properties of LaNiO2/SrTiO3 heterostructures, F. Bernardini and A. Cano, J. Phys. Mater. 3, 03LT01 (2020).

[5] Infinite-layer fluoro-nickelates as d9 model materials, F. Bernardini, V. Olevano, X. Blase, and A. Cano, J. Phys. Mater. 3, 035003 (2020); Single-layer T’-type nickelates: Ni1+ is Ni1+, F. Bernardini, A. Demourgues, and A. Cano, Phys. Rev. Materials 5, L061801 (2021).