YRu3B2 -- a kagome lattice superconductor
Abstract
We report the synthesis and physical properties of a polycrystalline, hexagonal boride YRu3B2. Our resistivity and heat capacity measurements indicate that YRu3B2 is a weakly coupled superconductor, with critical temperature Tc = 0.63 K and upper critical field μ0 Hc2 (0)=0.11 T. 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.
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