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Ground state theory of delta-Pu
1Department of Physics and Astronomy and Center for Condensed Matter Theory, Rutgers University, Piscataway, New Jersey 08854-8019, USA.
Physical Review Letters
|October 6, 2000
Summary
Accurate predictions for plutonium
Area of Science:
- Materials Science
- Condensed Matter Physics
- Quantum Chemistry
Background:
- Correlation effects significantly impact predictions for plutonium's delta phase.
- Accurately computing ground state properties of plutonium remains a challenge.
Purpose of the Study:
- To address the long-standing problem of computing ground state properties in plutonium.
- To investigate the role of intra-atomic Coulomb correlations in plutonium's delta phase.
Main Methods:
- Employed a realistic treatment of intra-atomic Coulomb correlations.
- Utilized Hubbard U parameter calculations, specifically around 4 eV.
Main Results:
- Achieved good agreement with experimental data for the equilibrium volume of plutonium.
- Predicted a 5f(5) atomiclike configuration with specific quantum numbers (L=5, S=5/2, J=5/2).
- Observed nearly complete compensation between spin and orbital magnetic moments.
Conclusions:
- The inclusion of Hubbard U is crucial for accurate ground state property predictions in plutonium.
- The calculated atomic configuration and magnetic moment compensation provide insights into plutonium's electronic structure.
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