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Self-consistent spin fluctuation spectrum and correlated electronic structure of actinides

Published online by Cambridge University Press:  08 February 2013

Tanmoy Das ,
Jian-Xin Zhu  and
Matthias J. Graf
Tanmoy Das*
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Jian-Xin Zhu
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Matthias J. Graf
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

We present an overview of various theoretical methods with detailed emphasis on an intermediate Coulomb-U coupling model. This model is based on material-specific ab initio band structure from which correlation effects are computed via self-consistent GW-based self-energy corrections arising from spin fluctuations. We apply this approach to four isostructural intermetallic actinides PuCoIn5, PuCoGa5, PuRhGa5 belonging to the Pu-115 family, and UCoGa5 a member of the U-115 family. The 115 families share the property of spin–orbit split density of states enabling substantial spin fluctuations around 0.5 eV, whose feedback effect on the electronic structure creates mass renormalization and electronic “hot spots,” i.e., regions of large spectral weight. A detailed comparison is provided for the angle-resolved and angle-integrated photoemission spectra and de Haas–van Alphen experimental data as available. The results suggest that this class of actinides is adequately described by the intermediate Coulomb interaction regime, where both itinerant and incoherent features coexist in the electronic structure.

Type
Invited Feature Review
Information
Journal of Materials Research , Volume 28 , Issue 5 , 14 March 2013 , pp. 659 - 672
Copyright
Copyright © Materials Research Society 2013

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Footnotes

This paper has been selected as an Invited Feature Paper.

References

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