Superconductivity in novel Ge-based skutterudites: {Sr,Ba}Pt_4Ge_{12}

Details Superconductivity in novel Ge-based skutterudites: {Sr,Ba}Pt_4Ge_{12} Superconductivity in novel Ge-based skutterudites: {Sr,Ba}Pt_4Ge_{12}

2007-10-03

arxiv.org/abs/0710.0738v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.99.217001

Combining experiments and ab initio models we report on $\rm SrPt_4Ge_{12}$ and $\rm BaPt_4Ge_{12}$ as members of a novel class of superconducting skutterudites, where Sr or Ba atoms stabilize a framework entirely formed by Ge-atoms. Below $T_c=5.35$ K, and 5.10 K for $\rm BaPt_4Ge_{12}$ and $\rm SrPt_4Ge_{12}$, respectively, electron-phonon coupled superconductivity emerges, ascribed to intrinsic features of the Pt-Ge framework, where Ge-$p$ states dominate the electronic structure at the Fermi energy.

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