Theoretical investigation of superconductivity in trilayer square-planar nickelates

Emilian M. Nica, Jyoti Krishna, Rong Yu, Qimiao Si, Antia S. Botana, Onur Erten

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

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. NdNiO2 is the infinite-layer member of a family of square-planar nickelates with general chemical formula Rn+1NinO2n+2 (R = La, Pr, Nd, n=2,3,...∞). In this Rapid Communication, we investigate superconductivity in the trilayer member of this series (R4Ni3O8) using a combination of first-principles and t-J model calculations. R4Ni3O8 compounds resemble cuprates more than RNiO2 materials in that only Ni-dx2-y2 bands cross the Fermi level, they exhibit a largely reduced charge transfer energy, and as a consequence superexchange interactions are significantly enhanced. We find that the superconducting instability in doped R4Ni3O8 compounds is considerably stronger with a maximum gap about four times larger than that in Sr0.2Nd0.8NiO2.

Original languageEnglish (US)
Article number020504
JournalPhysical Review B
Volume102
Issue number2
DOIs
StatePublished - Jul 1 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Theoretical investigation of superconductivity in trilayer square-planar nickelates'. Together they form a unique fingerprint.

Cite this