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Title: Origin of the multiple configurations that drive the response of δ-plutonium’s elastic moduli to temperature

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1388545
DOE Contract Number:
SC0001089
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America; Journal Volume: 113; Journal Issue: 40; Related Information: MSA partners with University of Notre Dame (lead); University of California, Davis; Florida State University; George Washington University; University of Michigan; University of Minnesota; Oak Ridge National Laboratory; Oregon state University; Rensselaer Polytechnic Institute; Savannah River National Laboratory
Country of Publication:
United States
Language:
English
Subject:
nuclear (including radiation effects), materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Migliori, Albert, Söderlind, Per, Landa, Alexander, Freibert, Franz J., Maiorov, Boris, Ramshaw, B. J., and Betts, Jon B. Origin of the multiple configurations that drive the response of δ-plutonium’s elastic moduli to temperature. United States: N. p., 2016. Web. doi:10.1073/pnas.1609215113.
Migliori, Albert, Söderlind, Per, Landa, Alexander, Freibert, Franz J., Maiorov, Boris, Ramshaw, B. J., & Betts, Jon B. Origin of the multiple configurations that drive the response of δ-plutonium’s elastic moduli to temperature. United States. doi:10.1073/pnas.1609215113.
Migliori, Albert, Söderlind, Per, Landa, Alexander, Freibert, Franz J., Maiorov, Boris, Ramshaw, B. J., and Betts, Jon B. 2016. "Origin of the multiple configurations that drive the response of δ-plutonium’s elastic moduli to temperature". United States. doi:10.1073/pnas.1609215113.
@article{osti_1388545,
title = {Origin of the multiple configurations that drive the response of δ-plutonium’s elastic moduli to temperature},
author = {Migliori, Albert and Söderlind, Per and Landa, Alexander and Freibert, Franz J. and Maiorov, Boris and Ramshaw, B. J. and Betts, Jon B.},
abstractNote = {},
doi = {10.1073/pnas.1609215113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 40,
volume = 113,
place = {United States},
year = 2016,
month = 9
}
  • The electronic and thermodynamic complexity of plutonium has resisted a fundamental understanding for this important elemental metal. critical test of any theory is the unusual softening of the bulk modulus with increasing temperature, a result that is counterintuitive because no or very little change in the atomic volume is observed upon heating. This unexpected behavior has in the past been attributed to competing but never-observed electronic states with different bonding properties similar to the scenario with magnetic states in Invar alloys. When using the recent observation of plutonium dynamic magnetism, we construct a theory for plutonium that agrees with relevantmore » measurements by using density-functional-theory (DFT) calculations with no free parameters to compute the effect of longitudinal spin fluctuations on the temperature dependence of the bulk moduli in δ-Pu. We also show that the softening with temperature can be understood in terms of a continuous distribution of thermally activated spin fluctuations.« less
    Cited by 5
  • The electronic and thermodynamic complexity of plutonium has resisted a fundamental understanding for this important elemental metal. critical test of any theory is the unusual softening of the bulk modulus with increasing temperature, a result that is counterintuitive because no or very little change in the atomic volume is observed upon heating. This unexpected behavior has in the past been attributed to competing but never-observed electronic states with different bonding properties similar to the scenario with magnetic states in Invar alloys. When using the recent observation of plutonium dynamic magnetism, we construct a theory for plutonium that agrees with relevantmore » measurements by using density-functional-theory (DFT) calculations with no free parameters to compute the effect of longitudinal spin fluctuations on the temperature dependence of the bulk moduli in δ-Pu. We also show that the softening with temperature can be understood in terms of a continuous distribution of thermally activated spin fluctuations.« less
  • The electronic and thermodynamic complexity of plutonium has resisted a fundamental understanding for this important elemental metal. A critical test of any theory is the unusual softening of the bulk modulus with increasing temperature, a result that is counterintuitive because no or very little change in the atomic volume is observed upon heating. This unexpected behavior has in the past been attributed to competing but never-observed electronic states with different bonding properties similar to the scenario with magnetic states in Invar alloys. Using the recent observation of plutonium dynamic magnetism, we construct a theory for plutonium that agrees with relevantmore » measurements by using density-functional-theory (DFT) calculations with no free parameters to compute the effect of longitudinal spin fluctuations on the temperature dependence of the bulk moduli in δ-Pu. Lastly, we show that the softening with temperature can be understood in terms of a continuous distribution of thermally activated spin fluctuations.« less
  • Cited by 28