X-ray-absorption spectroscopy study of the heavy-fermion superconductor PrOs4Sb12 -: art. no. 180511

被引：30

作者：

Cao, D ^{[1
]}

Bridges, F

Bushart, S

Bauer, ED

Maple, MB

机构：

[1] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.67.180511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

X-ray-absorption fine-structure (XAFS) measurements have been carried out at the Pr L-III and Os L-III edges on the Pr-based heavy-fermion superconductor PrOs4Sb12. The x-ray absorption near-edge structure results suggest that the Pr valence is very close to 3+ with at most a small amount of Pr4+ [v(Pr)similar to3.019(3)], while Os is close to metallic in this material. The extended XAFS results show that the Pr ions rattle inside the Sb cage characterized by a low Einstein temperature (Theta(E)similar to75 K), with a possible very small off-center displacement. They also indicate that the Os4Sb12 framework in PrOs4Sb12 is quite stiff.

引用

页数：4

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