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YRu3B2—a kagome lattice superconductor
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Journal Article
YRu3B2—a kagome lattice superconductor
2026
Overview
We report the synthesis and physical properties of a hexagonal boride YRu3B2, which was previously predicted to show superconductivity [N.K. Nepal, L.-L. Wang, arXiv:2409.18441 (2024)]. A polycrystalline sample was synthesized by arc-melting a pre-reacted YB2 and metallic Ru. Phase and elemental composition were characterized by means of powder x-ray diffraction and scanning electron microcopy. Our resistivity and heat capacity measurements indicate that YRu3B2 is a weakly coupled superconductor, with a critical temperature Tc = 0.63 K and an upper critical field μ0Hc2(0)=0.11 T. Isovalent substitution of Y with 5 at% and 10 at% of Sc resulted in a slight enhancement of the critical temperature up to ca. 0.8 K. Density functional theory calculations together with chemical-bonding analysis, reveal that the electronic states at and near the Fermi energy level are dominated by the Ru kagome sublattice.
Publisher
IOP Publishing
