Photoemission and the Electronic Structure of PuCoGa5

Details Photoemission and the Electronic Structure of PuCoGa5 Photoemission and the Electronic Structure of PuCoGa5

2003-10-09

arxiv.org/abs/cond-mat/0310218v1

Physics

Condensed Matter

accepted by PRL

Scientific paper

10.1103/PhysRevLett.91.176401

The electronic structure of the first Pu based superconductor PuCoGa5 is explored using photoelectron spectroscopy and a novel theoretical scheme. Exceptional agreement between calculation and experiment defines a path forward for understanding electronic structure aspects of Pu based materials. The photoemission results show two separate regions of 5f electron spectral intensity, one at the Fermi energy and another centered 1.2 eV below the Fermi level. The results for PuCoGa5 clearly indicate 5f electron behavior on the threshold between localized and itinerant. Comparisons to delta phase Pu metal show a broader framework for understanding the fundamental electronic properties of the Pu 5f levels in general within two configurations, one localized and one itinerant.

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