Similarities and differences between infinite-layer nickelates and cuprates and implications for superconductivity
Abstract
We have revisited the electronic structure of infinite-layer RNiO2 (R= La, Nd) in light of the recent discovery of superconductivity in Sr-doped NdNiO2. From a comparison to their cuprate counterpart CaCuO2, we derive essential facts related to their electronic structures, in particular the values for various hopping parameters and energy splittings, and the influence of the spacer cation. From this detailed comparison, we comment on expectations in regards to superconductivity. In particular, both materials exhibit a large ratio of longer-range hopping to near-neighbor hopping which should be conducive for superconductivity.
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