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Paper detail

Charge-Doping driven Evolution of Magnetism and non-Fermi-Liquid Behavior in the Filled Skutterudite CePt4Ge12-xSbx

The filled-skutterudite compound CePt4Ge12 is situated close to the border between intermediate-valence of Ce and heavy-fermion behavior. Substitution of Ge by Sb drives the system into a strongly correlated and ultimately upon further increasing the Sb concentration into an antiferromagnetically ordered state. Our experiments evidence a delicate interplay of emerging Kondo physics and the formation of a local 4f moment. An extended non-Fermi-liquid region, which can be understood in the framework of a Kondo-disorder model, is observed. Band-structure calculations support the conclusion that the physical properties are governed by the interplay of electron supply via Sb substitution and the concomitant volume effects.

preprint2012arXivOpen access
M. NicklasS. KirchnerR. BorthR. GumeniukW. SchnelleH. RosnerH. BorrmannA. Leithe-JasperYu. GrinF. Steglich
cond-mat.str-elcond-mat.mtrl-sci
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M. NicklasS. KirchnerR. BorthR. GumeniukW. SchnelleH. RosnerH. BorrmannA. Leithe-JasperYu. GrinF. Steglich

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