Superconductivity in novel Ge-based skutterudites: {Sr,Ba}pt4Ge12.
Combining experiments and ab initio models we report on SrPt4Ge12 and BaPt4Ge12 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 BaPt4Ge12 and SrPt4Ge12, 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.
Bauer
E
E
Institute of Solid State Physics, Vienna University of Technology, A-1040 Wien, Austria.
Grytsiv
A
A
Chen
Xing-Qiu
XQ
Melnychenko-Koblyuk
N
N
Hilscher
G
G
Kaldarar
H
H
Michor
H
H
Royanian
E
E
Giester
G
G
Rotter
M
M
Podloucky
R
R
Rogl
P
P