Possible High Tc Superconductivity in La3Ni2O7 under High Pressure through Manifestation of a Nearly Half-Filled Bilayer Hubbard Model
Hirofumi Sakakibara, Naoya Kitamine, Masayuki Ochi, Kazuhiko Kuroki
DOI 10.1103/PhysRevLett.132.106002 · Physical Review Letters
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Abstract
Inspired by a recent experiment showing that La3Ni2O7 exhibits high Tc superconductivity under high pressure, we theoretically revisit the possibility of superconductivity in this material. We find that superconductivity can take place, which is somewhat similar to that of the bilayer Hubbard model consisting of the Ni 3d3z2−r2 orbitals. Although the coupling with the 3dx2−y2 orbitals degrades superconductivity, Tc can still be high enough to understand the experiment thanks to the very high Tc reached in the bilayer Hubbard model.
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 | 14 GPa | onset |
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