Abstract
We report the discovery of a novel form of Ruddlesden-Popper (RP) nickelate that stands as the first example of long-range, coherent polymorphism in this class of inorganic solids. Rather than the well-known, uniform stacking of perovskite blocks ubiquitously found in RP phases, this newly discovered polymorph of the bilayer RP phase La3Ni2O7 adopts a novel stacking sequence in which single-layer and trilayer blocks of NiO6 octahedra alternate in a “1313” sequence. Crystals of this new polymorph are described in space group Cmmm, although we note evidence for a competing Imam variant. Transport measurements at ambient pressure reveal metallic character with evidence of a charge density wave transition with an onset at T ≈ 134 K. The discovery of such polymorphism could reverberate to the expansive range of science and applications that rely on RP materials, particularly the recently reported signatures of superconductivity in bilayer La3Ni2O7 with Tc as high as 80 K above 14 GPa.
Original language | English (US) |
---|---|
Pages (from-to) | 3640-3645 |
Number of pages | 6 |
Journal | Journal of the American Chemical Society |
Volume | 146 |
Issue number | 6 |
DOIs | |
State | Published - Feb 14 2024 |
Externally published | Yes |
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Biochemistry
- Colloid and Surface Chemistry
Fingerprint
Dive into the research topics of 'Polymorphism in the Ruddlesden-Popper Nickelate La3Ni2O7: Discovery of a Hidden Phase with Distinctive Layer Stacking'. Together they form a unique fingerprint.Datasets
-
CSD 2313278: Experimental Crystal Structure Determination
Chen, X. (Contributor), Zhang, J. (Contributor), Thind, A. S. (Contributor), Sharma, S. (Contributor), LaBollita, H. (Contributor), Peterson, G. (Contributor), Zheng, H. (Contributor), Phelan, D. P. (Contributor), Sanchez Botana, A. (Contributor), Klie, R. F. (Contributor) & Mitchell, J. F. (Contributor), FIZ Karlsruhe - Leibniz Institute for Information Infrastructure, 2024
DOI: 10.25505/fiz.icsd.cc2hn4w6, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.25505/fiz.icsd.cc2hn4w6&sid=DataCite
Dataset
-
CSD 2313280: Experimental Crystal Structure Determination
Chen, X. (Contributor), Zhang, J. (Contributor), Thind, A. S. (Contributor), Sharma, S. (Contributor), LaBollita, H. (Contributor), Peterson, G. (Contributor), Zheng, H. (Contributor), Phelan, D. P. (Contributor), Sanchez Botana, A. (Contributor), Klie, R. F. (Contributor) & Mitchell, J. F. (Contributor), FIZ Karlsruhe - Leibniz Institute for Information Infrastructure, 2024
DOI: 10.25505/fiz.icsd.cc2hn4y8, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.25505/fiz.icsd.cc2hn4y8&sid=DataCite
Dataset