Character of doped holes in Nd1−XSrxNiO2

Tharathep Plienbumrung, Michael Thobias Schmid, Maria Daghofer, Andrzej M. Oleś*

*この研究の対応する著者

研究成果: Article査読

抄録

We investigate charge distribution in the recently discovered high-Tc superconductors, layered nickelates. With increasing value of charge-transfer energy, we observe the expected crossover from the cuprate to the local triplet regime upon hole doping. We find that the d − p Coulomb interaction Udp makes Zhang-Rice singlets less favorable, while the amplitude of local triplets at Ni ions is enhanced. By investigating the effective two-band model with orbitals of x2 − y2 and s symmetries we show that antiferromagnetic interactions dominate for electron doping. The screened interactions for the s band suggest the importance of rare-earth atoms in superconducting nickelates.

本文言語English
論文番号33
ジャーナルCondensed Matter
6
3
DOI
出版ステータスPublished - 2021 9

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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