Control of Polarity in Kagome-NiAs Bismuthides.

Gibson, Quinn D ORCID: 0000-0001-7020-199X, Wen, Dongsheng ORCID: 0000-0002-0728-0231, Lin, Hai ORCID: 0000-0002-6139-4563, Zanella, Marco ORCID: 0000-0002-6164-6169, Daniels, Luke M ORCID: 0000-0002-7077-6125, Robertson, Craig M ORCID: 0000-0002-4789-7607, Claridge, John B ORCID: 0000-0003-4849-6714, Alaria, Jonathan ORCID: 0000-0001-5868-0318, Dyer, Matthew S ORCID: 0000-0002-4923-3003 and Rosseinsky, Matthew J ORCID: 0000-0002-1910-2483
(2024) Control of Polarity in Kagome-NiAs Bismuthides. Angewandte Chemie (International ed. in English), 63 (23). e202403670-.

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A 2×2×1 superstructure of the P6<sub>3</sub>/mmc NiAs structure is reported in which kagome nets are stabilized in the octahedral transition metal layers of the compounds Ni<sub>0.7</sub>Pd<sub>0.2</sub>Bi, Ni<sub>0.6</sub>Pt<sub>0.4</sub>Bi, and Mn<sub>0.99</sub>Pd<sub>0.01</sub>Bi. 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 Ni<sub>0.9</sub>Bi and Ni<sub>0.79</sub>Pd<sub>0.08</sub>Bi, 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.

Item Type: Article
Uncontrolled Keywords: Intermetallic, Kagome, NiAs, Polar metal
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 19 Mar 2024 16:52
Last Modified: 08 Jun 2024 02:50
DOI: 10.1002/anie.202403670
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