In cuprates, electron doping yields a much lower superconducting Tc than hole doping. For recently discovered nickelate superconductors, the analogous doping strategies become more challenging. Consequently, while hole-doped Ruddlesden-Popper (RP) nickelates have been extensively studied, electron-doped RP nickelates remain rarely explored both experimentally and theoretically. Here we fill this gap by systematically investigating the two-orbital bilayer model for three representative systems: bulk La3Ni2O7 at ambient pressure and 15\,GPa, and a heterostructure La3Ni2O7:La3Al2O7 that provides a feasible experimental route to electron doping. Using first-principle calculations and large-scale dynamical cluster quantum Monte Carlo simulations, we find that electron doping generically enhances s±-wave pairing superconductivity (SC) in all three cases, with the heterostructure showing the highest Tc in the underdoped regime. Furthermore, our results suggest an inter-orbital cooperative mechanism that the pairing on the dx2−y2 orbital, induced by that on the dz2 orbital, plays a vital role in the SC. This work provides the theoretical prediction of enhanced SC in electron-doped RP nickelates and calls for future experimental verification.
@article{arxiv.2605.17520,
title = {Enhanced $s^\pm$-wave superconductivity in electron-doped La$_3$Ni$_2$O$_7$},
author = {Xun Liu and Chao Deng and Wenfeng Wu and Liang Si and Mi Jiang},
journal= {arXiv preprint arXiv:2605.17520},
year = {2026}
}