Theoretical study on the possibility of high Tc s±-wave superconductivity in heavily hole-doped infinite layer nickelates
Hirofumi Sakakibara, Ryota Mizuno, Masayuki Ochi, Hidetomo Usui, Kazuhiko Kuroki
DOI 10.1103/nl4m-n5dx · Physical Review B
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Abstract
We theoretically propose a possibility of realizing high-Tc superconductivity having s±-wave symmetry in the heavily hole-doped infinite layer nickelates La1−xSrxNiO2. We consider situations where the original P4/mmm symmetry of LaNiO2 is maintained even for a significant amount of Sr substitution by growing thin films on substrates having tetragonal symmetry. Considering such cases is indeed justified by our phonon calculations. For electron configurations somewhat close to d8, the interaction between the dx2−y2 band and the other 3d bands that lie just below the Fermi level results in an enhancement of superconductivity where the sign of the gap function is reversed between the former and the latter bands.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | onset |
| La4Ni3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
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