| Autor: |
Plienbumrung, Tharathep, Schmid, Michael Thobias, Daghofer, Maria, Ole´s, Andrzej M. |
| Předmět: |
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| Zdroj: |
Condensed Matter; Sep2021, Vol. 6 Issue 3, p1-11, 11p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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