Superconductivity in Monolayer-Trilayer Phase of La 3 Ni 2 O 7 under High Pressure
- 1Sun Yat-Sen University
- 2Chinese Academy of Sciences
- 3University of Chinese Academy of Sciences
Abstract
The discovery of 80 K superconductivity in pressurized bilayer Ruddlesden-Popper (RP) nickelate La 3 Ni 2 O 7 has established a new high-temperature superconductor family [1]. The quest to understand the governing principles of RP nickelate superconductivity has become a central focus in condensed matter physics. Here, we report a critical advance by synthesizing and investigating a distinct structural polymorph of the same compound: the monolayer-trilayer (1313) phase of La 3 Ni 2 O 7 . Under high pressure, synchrotron x-ray diffraction and Raman spectroscopy reveal a structural transition from the orthorhombic C m m m to the tetragonal P 4 / m m m space group at 13 GPa. Above 19 GPa, the phase shows a clear superconducting transition, confirmed by a zero-resistance state, albeit at a much lower temperature of 3.6 K. The stark contrast with the 80 K transition in the bilayer phase provides a uniquely clean experimental comparison. Our results not only expand the family of RP nickelate superconductors but also deepen the understanding of the superconducting mechanism that governs the transition temperature in these materials.
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BibTeX
@article{anonymous2026superconductivity,
title = {{Superconductivity in Monolayer-Trilayer Phase of La 3 Ni 2 O 7 under High Pressure}},
author = {Anonymous and Jingyuan Li and Xing Huang and Hengyuan Zhang and Deyuan Hu and Mengwu Huo and Xiang Chen and Zhen Chen and Hualei Sun and Meng Wang},
journal = {Physical Review X},
year = {2026},
month = aug,
doi = {10.1103/jc35-gj2l},
url = {https://doi.org/10.1103/jc35-gj2l},
note = {CC BY},
}
RIS
TY - JOUR
TI - Superconductivity in Monolayer-Trilayer Phase of La 3 Ni 2 O 7 under High Pressure
AU - Anonymous
AU - Jingyuan Li
AU - Xing Huang
AU - Hengyuan Zhang
AU - Deyuan Hu
AU - Mengwu Huo
AU - Xiang Chen
AU - Zhen Chen
AU - Hualei Sun
AU - Meng Wang
PY - 2026
DA - 2026/08/20
JO - Physical Review X
DO - 10.1103/jc35-gj2l
UR - https://doi.org/10.1103/jc35-gj2l
AB - The discovery of 80 K superconductivity in pressurized bilayer Ruddlesden-Popper (RP) nickelate La 3 Ni 2 O 7 has established a new high-temperature superconductor family [1]. The quest to understand the governing principles of RP nickelate superconductivity has become a central focus in condensed matter physics. Here, we report a critical advance by synthesizing and investigating a distinct structural polymorph of the same compound: the monolayer-trilayer (1313) phase of La 3 Ni 2 O 7 . Under high pressure, synchrotron x-ray diffraction and Raman spectroscopy reveal a structural transition from the orthorhombic C m m m to the tetragonal P 4 / m m m space group at 13 GPa. Above 19 GPa, the phase shows a clear superconducting transition, confirmed by a zero-resistance state, albeit at a much lower temperature of 3.6 K. The stark contrast with the 80 K transition in the bilayer phase provides a uniquely clean experimental comparison. Our results not only expand the family of RP nickelate superconductors but also deepen the understanding of the superconducting mechanism that governs the transition temperature in these materials.
SN - 2160-3308
ER -