期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.207004
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资金
- Stewart Blusson Quantum Matter Institute at University of British Columbia
- Natural Sciences and Engineering Research Council of Canada
Superconductivity with T-c approximate to 15 K was recently found in doped NdNiO2. The Ni1+O2 layers are expected to be Mott insulators, so hole doping should produce Ni2+ with S = 1, incompatible with robust superconductivity. We show that the NiO2 layers fall inside a critical region where the large pd hybridization favors a singlet (1)A(1) hole-doped state like in CuO2. However, we find that the superexchange is about one order smaller than in cuprates, thus a magnon glue is very unlikely and another mechanism needs to be found.
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