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Article

Character of Doped Holes in Nd1−xSrxNiO2

1
Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
2
Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
3
Waseda Research Institute for Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
4
Institute of Theoretical Physics, Jagiellonian University, ul. Prof. S. Łojasiewicza 11, 30-348 Kraków, Poland
5
Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Bianconi
Condens. Matter 2021, 6(3), 33; https://doi.org/10.3390/condmat6030033
Received: 29 July 2021 / Revised: 16 August 2021 / Accepted: 17 August 2021 / Published: 19 August 2021
(This article belongs to the Special Issue Quantum Complex Matter from Charge Density Waves to Superstripes)
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 dp 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 x2y2 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. View Full-Text
Keywords: high-Tc superconductivity; orbital symmetry; two-band model; Mott insulator; charge-transfer insulator; entanglement; degenerate Hubbard model; cooper pairing high-Tc superconductivity; orbital symmetry; two-band model; Mott insulator; charge-transfer insulator; entanglement; degenerate Hubbard model; cooper pairing
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MDPI and ACS Style

Plienbumrung, T.; Schmid, M.T.; Daghofer, M.; Oleś, A.M. Character of Doped Holes in Nd1−xSrxNiO2. Condens. Matter 2021, 6, 33. https://doi.org/10.3390/condmat6030033

AMA Style

Plienbumrung T, Schmid MT, Daghofer M, Oleś AM. Character of Doped Holes in Nd1−xSrxNiO2. Condensed Matter. 2021; 6(3):33. https://doi.org/10.3390/condmat6030033

Chicago/Turabian Style

Plienbumrung, Tharathep, Michael T. Schmid, Maria Daghofer, and Andrzej M. Oleś. 2021. "Character of Doped Holes in Nd1−xSrxNiO2" Condensed Matter 6, no. 3: 33. https://doi.org/10.3390/condmat6030033

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