4f electron delocalization and volume collapse in praseodymium metal

被引：29

作者：

Bradley, Joseph A. ^{[1
]}

Moore, Kevin T. ^{[1
]}

Lipp, Magnus J. ^{[1
]}

Mattern, Brian A. ^{[2
]}

Pacold, Joseph I. ^{[2
]}

Seidler, Gerald T. ^{[2
]}

Chow, Paul ^{[3
]}

Rod, Eric ^{[3
]}

Xiao, Yuming ^{[3
]}

Evans, William J. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Condensed Matter & Mat Div, Livermore, CA 94550 USA

[2] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[3] Carnegie Inst Washington, Geophys Lab, HP CAT, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 10期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

HIGH-PRESSURE; DIAMOND-ANVIL; GPA;

D O I：

10.1103/PhysRevB.85.100102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the pressure evolution of the 4f electrons in elemental praseodymium metal compressed through several crystallographic phases, including the large volume-collapse transition at 20 GPa. Using resonant x-ray emission, we directly and quantitatively measure the development of multiple electronic configurations with differing 4f occupation numbers, the key quantum observable related to the delocalization of the strongly correlated 4f electrons. These results provide a high-fidelity test of prior predictions by dynamical mean-field theory, and support the hypothesis of a strong connection between electronic and structural degrees of freedom at the volume-collapse transition.

引用

页数：5

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