【摘 要】
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We report the synthesis and superconducting properties of a layered cage compound Ba3Rh4Ge16.Similar to Ba3Ir4Ge16,the compound is composed of 2D networks of cage units,formed by noncubic Rh Ge building blocks,in marked contrast to the reported rattling c
【机 构】
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School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;University o
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We report the synthesis and superconducting properties of a layered cage compound Ba3Rh4Ge16.Similar to Ba3Ir4Ge16,the compound is composed of 2D networks of cage units,formed by noncubic Rh Ge building blocks,in marked contrast to the reported rattling compounds.The electrical resistivity,magnetization,specific heat capacity,and μSR measurements unveiled moderately coupled s-wave superconductivity with a critical temperature Tc =7.0 K,the upper critical field μ0Hc2(0) ～ 2.5 T,the electron-phonon coupling strength λe-ph ～0.80,and the Ginzburg-Landau parameter κ ～ 7.89.The mass reduction with the substitution of Ir by Rh is believed to be responsible for the enhancement of Tc and coupling between the cage and guest atoms.Our results highlight the importance of atomic weight of framework in cage compounds in controlling the λe-ph strength and Tc.
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