Superconductivity in nickelates: similarities & differences from cuprates and heavy fermions
Prof. Onur Erten
Department of Physics, Arizona State University
The discovery of superconductivity in Sr-doped NdNiO2 is a crucial breakthrough in the long pursuit for nickel oxide materials with electronic and magnetic properties similar to those of the cuprates. In this talk, I will discuss the similarities and the unique properties of nickelates compared to other unconventional superconductors. Combined with ab initio and t-j model calculations, I will argue that trilayer nickelates are much closer to cuprates in terms phenomenology along with potentially higher Tc compared to NdNiO2 . Presence of an additional metallic band differentiates NdNiO2 from cuprates and our calculations suggest that strong enough coupling to the correlated band can result in (s+id) pairing with broken time reversal and rotational symmetries .
 Nica, Krishna, Yu, Si, Botana, Erten PRB (R) 102, 020504 (2020)
 Nica, Erten arXiv2007.04373 (2020)
All interested persons are invited to attend remotely—email firstname.lastname@example.org for information.