Control of Polarity in Kagome‐NiAs Bismuthides

Gibson, Quinn D, Wen, Dongsheng, Lin, Hai, Zanella, Marco, Daniels, Luke M, Robertson, Craig M, Claridge, John B, Alaria, Jonathan, Dyer, Matthew S and Rosseinsky, Matthew J
(2024) Control of Polarity in Kagome‐NiAs Bismuthides. Angewandte Chemie, 136 (23).

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<jats:p>A 2×2×1 superstructure of the P63/mmc NiAs structure is reported in which kagome nets are stabilized in the octahedral transition metal layers of the compounds Ni0.7Pd0.2Bi, Ni0.6Pt0.4Bi, and Mn0.99Pd0.01Bi. The ordered vacancies that yield the true hexagonal kagome motif lead to filling of trigonal bipyramidal interstitial sites with the transition metal in this family of “kagome‐NiAs” type materials. Further ordering of vacancies within these interstitial layers can be compositionally driven to simultaneously yield kagome‐connected layers and a net polarization along the c axes in Ni0.9Bi and Ni0.79Pd0.08Bi, which adopt Fmm2 symmetry. The polar and non‐polar materials exhibit different electronic transport behaviour, reflecting the tuneability of both structure and properties within the NiAs‐type bismuthide materials family.</jats:p>

Item Type: Article
Uncontrolled Keywords: 3402 Inorganic Chemistry, 3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences, 51 Physical Sciences, 5104 Condensed Matter Physics
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 25 Mar 2024 10:43
Last Modified: 16 Jun 2024 07:10
DOI: 10.1002/ange.202403670
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