Selective suppression of electronic orders via interlayer coupling in superconducting bilayer nickelate thin films
Abstract
The discovery of spin-density-wave (SDW) order in bilayer nickelates has intensified interest in its interplay with superconductivity. Unlike cuprates, where doping rapidly suppresses the Néel temperature, the SDW transition temperature (TSDW) in bilayer nickelates is robust against oxygen annealing and even increases under pressure. Here, we combine oxygen annealing with isovalent rare-earth (A-site) substitution to effectively apply c-axis uniaxial pressure, realizing superconducting bilayer nickelate films with TSDW suppressed from 150 K to 70 K. Notably, while SDW order is weakened but remains, a second charge-like anisotropy order is completely eliminated in the superconducting state. Polarization-resolved O K-edge X-ray absorption and electronic structure calculations show that strengthened interlayer coupling reconstructs the Fermi surface and weakens the SDW. These findings, consistent with a spin-spinless stripe ground state, provide new insight into the mechanism of density wave formation and their interplay with superconductivity.
Related
- Orbital-Selective Coexistence of Interlayer Spin-Singlet Formation and SDW Order with Anomalous Spin Reconfiguration in Bilayer Nickelate La3Ni2O7 Revealed by 17O-NMR
- Interlayer pairing mechanism for bilayer nickelate superconductors
- Superconducting weak links at substrate steps in bilayer nickelate films
- Stripe-Like Superconducting Enhancement and Coexisting Magnetic Texture in an Infinite Layer Nickelate
- Electronic theory for scanning tunneling microscopy spectra in bilayer nickelate thin films
BibTeX
@misc{han2026selective,
title = {{Selective suppression of electronic orders via interlayer coupling in superconducting bilayer nickelate thin films}},
author = {Ziao Han and Lifen Xiang and Tianren Wang and Congcong Le and Jun Zhan and Siyi Lei and Sonia Francoual and Qisi Wang and Jiangping Hu and Tao Xiang and Ronny Sutarto and Xianxin Wu and X. J. Zhou and Zhihai Zhu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.01757},
eprint = {2610.01757},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.01757},
}
RIS
TY - UNPB
TI - Selective suppression of electronic orders via interlayer coupling in superconducting bilayer nickelate thin films
AU - Ziao Han
AU - Lifen Xiang
AU - Tianren Wang
AU - Congcong Le
AU - Jun Zhan
AU - Siyi Lei
AU - Sonia Francoual
AU - Qisi Wang
AU - Jiangping Hu
AU - Tao Xiang
AU - Ronny Sutarto
AU - Xianxin Wu
AU - X. J. Zhou
AU - Zhihai Zhu
PY - 2026
DA - 2026/10/01
PB - arXiv
DO - 10.48550/arxiv.2610.01757
UR - https://arxiv.org/abs/2610.01757
AB - The discovery of spin-density-wave (SDW) order in bilayer nickelates has intensified interest in its interplay with superconductivity. Unlike cuprates, where doping rapidly suppresses the Néel temperature, the SDW transition temperature (T_SDW) in bilayer nickelates is robust against oxygen annealing and even increases under pressure. Here, we combine oxygen annealing with isovalent rare-earth (A-site) substitution to effectively apply c-axis uniaxial pressure, realizing superconducting bilayer nickelate films with T_SDW suppressed from 150 K to 70 K. Notably, while SDW order is weakened but remains, a second charge-like anisotropy order is completely eliminated in the superconducting state. Polarization-resolved O K-edge X-ray absorption and electronic structure calculations show that strengthened interlayer coupling reconstructs the Fermi surface and weakens the SDW. These findings, consistent with a spin-spinless stripe ground state, provide new insight into the mechanism of density wave formation and their interplay with superconductivity.
ER -