Transition from s±-wave to dx2−y2-wave superconductivity driven by interlayer interaction in the bilayer two-orbital model of La3Ni2O7
Wenhan Xi, Shun-Li Yu, Jian-Xin Li
DOI 10.1103/PhysRevB.111.104505 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We utilize the fluctuation-exchange approximation on a bilayer two-orbital model, incorporating dx2−y2 and dz2 orbitals, to explore potential pairing symmetries in the bilayer nickelate La3Ni2O7. Our study particularly examines the impact of interlayer Coulomb interactions. In the absence of these interactions, the superconducting gap exhibits s±-wave symmetry, with predominant intraorbital pairing in the dz2 orbital. As interlayer interactions increase, s±-wave superconductivity is suppressed, while the superconductivity with a dx2−y2-wave gap is enhanced, resulting in a transition at a critical interaction strength. This dx2−y2-wave superconductivity is distinct not only from the s±-wave superconductivity but also from the intraorbital d-wave pairing in cuprate superconductors, as it is dominated by the interlayer pairing between the dx2−y2 and dz2 orbitals. Additionally, charge fluctuations play a crucial role in driving the transition from s±-wave to dx2−y2-wave superconductivity. Our findings indicate that interlayer Coulomb interactions are crucial for understanding the pairing mechanism in La3Ni2O7.
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 |
Similar papers
Interlayer interactions in La3Ni2O7 under pressure: From s± to dxy-wave superconductivity
similarity 0.96Lauro B. Braz et al.
Source status unknown — claims are unverified
Interlayer-Coupling-Driven High-Temperature Superconductivity in La3Ni2O7 under Pressure
similarity 0.96Chen Lu et al.
Source status unknown — claims are unverified
Spin density wave and superconductivity in the bilayer t−J model of La3Ni2O7 under renormalized mean-field theory
similarity 0.96Yang Tian & Yan Chen
Source status unknown — claims are unverified
Unifying strain- and pressure-driven superconductivity in La3Ni2O7: Suppressed charge and spin density waves and enhanced interlayer coupling
similarity 0.96Xin-Wei Yi et al.
Source status unknown — claims are unverified
Unconventional Crystal Structure of the High-Pressure Superconductor La3Ni2O7
similarity 0.96P. Puphal et al.
Source status unknown — claims are unverified
Trends in electronic structures and s±-wave pairing for the rare-earth series in bilayer nickelate superconductor R3Ni2O7
similarity 0.95Yang Zhang et al.
Source status unknown — claims are unverified