Control of Polarity in Kagome-NiAs Bismuthides

Gibson, Quinn D, Wen, Dongsheng ORCID: 0000-0002-0728-0231, Lin, Hai, 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 EDITION, 63 (23). e202403670-. ISSN 1433-7851, 1521-3773

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Abstract

A 2×2×1 superstructure of the P6<inf>3</inf>/mmc NiAs structure is reported in which kagome nets are stabilized in the octahedral transition metal layers of the compounds Ni<inf>0.7</inf>Pd<inf>0.2</inf>Bi, Ni<inf>0.6</inf>Pt<inf>0.4</inf>Bi, and Mn<inf>0.99</inf>Pd<inf>0.01</inf>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<inf>0.9</inf>Bi and Ni<inf>0.79</inf>Pd<inf>0.08</inf>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:	Kagome, NiAs, Intermetallic, Polar metal
Divisions:	Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	19 Mar 2024 16:52
Last Modified:	16 Jun 2026 17:07
DOI:	10.1002/anie.202403670
Open Access URL:	https://onlinelibrary.wiley.com/doi/abs/10.1002/an...
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3179714
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