Bibliographic Details
| Title: |
Chemical versus physical pressure effects on the structure transition of bilayer nickelates |
| Authors: |
Gang Wang, Ningning Wang, Tenglong Lu, Stuart Calder, Jiaqiang Yan, Lifen Shi, Jun Hou, Liang Ma, Lili Zhang, Jianping Sun, Bosen Wang, Sheng Meng, Miao Liu, Jinguang Cheng |
| Source: |
npj Quantum Materials, Vol 10, Iss 1, Pp 1-7 (2025) |
| Publisher Information: |
Nature Portfolio, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Materials of engineering and construction. Mechanics of materials
LCC:Atomic physics. Constitution and properties of matter |
| Subject Terms: |
Materials of engineering and construction. Mechanics of materials, TA401-492, Atomic physics. Constitution and properties of matter, QC170-197 |
| More Details: |
Abstract The observation of high-T c superconductivity (HTSC) in concomitant with pressure-induced orthorhombic-tetragonal structural transition in bilayer La3Ni2O7 has sparked hopes of achieving HTSC by stabilizing the tetragonal phase at ambient pressure. Chemical pressure, introduced by replacing La3+ with smaller rare-earth R 3+ has been considered as a potential route. However, our experimental and theoretical investigation reveals that such substitutions, despite causing lattice contraction, actually produce stronger orthorhombic distortions, requiring higher pressures for the structural transition. A linear extrapolation of P c versus the average size of A-site cations (), yields a putative critical value of c ≈ 1.23 Å for P c ≈ 1 bar. The negative correlation between P c and indicates that replacing La3+ with smaller R 3+ ions is unlikely to reduce P c to ambient pressure. Instead, substituting La3+ with larger cations like Sr2+ or Ba2+ might be a feasible approach. Our results provide guidance for realizing ambient-pressure HTSC in bilayer nickelates. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2397-4648 |
| Relation: |
https://doaj.org/toc/2397-4648 |
| DOI: |
10.1038/s41535-024-00721-8 |
| Access URL: |
https://doaj.org/article/9ebccc2fa4fb44bf924dbec3d9e81d5d |
| Accession Number: |
edsdoj.9ebccc2fa4fb44bf924dbec3d9e81d5d |
| Database: |
Directory of Open Access Journals |
