Electronic properties of Pu19Os simulating beta-Pu: the strongly correlated Pu phase

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10374586" target="_blank" >RIV/00216208:11320/18:10374586 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/18:00498389
Result on the web
<a href="https://doi.org/10.1088/1361-648X/aaa520" target="_blank" >https://doi.org/10.1088/1361-648X/aaa520</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-648X/aaa520" target="_blank" >10.1088/1361-648X/aaa520</a>

Result language
angličtina
Original language name
Electronic properties of Pu19Os simulating beta-Pu: the strongly correlated Pu phase
Original language description
We established the basic electronic properties of zeta-Pu19Os, which is a close analogue to beta-Pu, and its low-temperature variety, eta-Pu19Os. Their magnetic susceptibility is 15% higher than for delta-Pu. A specific heat study of zeta-Pu19Os shows a soft lattice similar to delta-Pu, leading to a low Debye temperature Theta(D) = 101 K. The linear electronic coefficient gamma related to the quasiparticle density of states at the Fermi level points to a higher value, 55 +/- 2 mJ (mol Pu K-2)(-1), compared to 40 mJ (mol K-2)(-1) for delta-Pu. The results confirm that beta-Pu is probably the most strongly correlated Pu phase, as had been indicated by resistivity measurements. The volume and related Pu-Pu spacing is clearly not the primary tuning parameter for Pu metal, as the beta-Pu density stands close to the ground-state alpha-phase and is much higher than that for delta-Pu. The eta-Pu19Os phase has a record gamma-value of 74 +/- 2 mJ (mol Pu K-2)(-1). The enhancement is not reproduced by LDA+DMFT calculations in the fcc structure, which suggests that multiple diverse sites can be the key to the understanding of beta-Pu.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/GA15-01100S" target="_blank" >GA15-01100S: 5f magnetism in hydrides on the basis of gamma-U alloys</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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