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Superconductivity in Novel Ge-Based Skutterudites:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">{</mml:mo><mml:mi>Sr</mml:mi><mml:mo>,</mml:mo><mml:mi>Ba</mml:mi><mml:mo stretchy="false">}</mml:mo><mml:msub><mml:mi>Pt</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi>Ge</mml:mi><mml:mn>12</mml:mn></mml:msub></mml:math>
Combining experiments and ab initio models we report on ${\mathrm{SrPt}}_{4}{\mathrm{Ge}}_{12}$ and ${\mathrm{BaPt}}_{4}{\mathrm{Ge}}_{12}$ as members of a novel class of superconducting skutterudites, where Sr or Ba atoms stabilize a framework entirely formed by Ge atoms. Below ${T}_{c}=5.35$ and 5.10 K for ${\mathrm{BaPt}}_{4}{\mathrm{Ge}}_{12}$ and ${\mathrm{SrPt}}_{4}{\mathrm{Ge}}_{12}$, respectively, electron-phonon coupled superconductivity emerges, ascribed to …