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This study examines how nonlocal Coulomb repulsion affects competing quantum phases in bilayer nickelate superconductors. The researchers find that extended electron-electron interactions beyond nearest neighbors significantly influence the balance between superconducting and density-wave orders in these materials. Their theoretical modeling suggests that nonlocal Coulomb effects can suppress certain density-wave instabilities while stabilizing superconductivity in the bilayer nickelate structure.
Why it matters
Understanding the role of nonlocal interactions in nickelate superconductors could guide the design of higher-temperature superconducting materials with more robust properties. This work provides theoretical insights that may help optimize nickelate-based quantum devices and advance the development of practical superconducting technologies.