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Manna, P.
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document
Superconductivity in Breathing Kagome-Structured C14 Laves Phase XOs2(X = Zr, Hf)
Abstract
Recently, the emergence of superconductivity in kagome metals has generated significant interest due to its interaction with flat bands and topological electronic states, which exhibit a range of unusual quantum characteristics. This study thoroughly investigates largely unexplored breathing Kagome structure C14 laves phase compounds XOs$_{2}$ (X = Zr, Hf) by XRD, electrical transport, magnetization, and specific heat measurements. Our analyses confirm the presence of the MgZn$_{2}$-type structure in ZrOs$_{2}$ and HfOs$_{2}$ compounds, exhibiting type-II superconductivity with critical temperature (T$_{C}$) values of 2.90(3) K and 2.69(6) K, respectively. Furthermore, specific heat measurements and an electron-phonon coupling constant suggest the presence of weakly coupled BCS superconductivity in both compounds.