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Fingerprints of electron correlations in plutonium phases: Electronic properties of β-Pu analogs
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SYSNO ASEP 0522430 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Fingerprints of electron correlations in plutonium phases: Electronic properties of β-Pu analogs Author(s) Havela, L. (CZ)
Mašková, S. (CZ)
Javorský, P. (CZ)
Kolorenč, Jindřich (FZU-D) RID, ORCID, SAI
Colineau, E. (DE)
Griveau, J.C. (DE)
Eloirdi, R. (DE)
Gouder, T. (DE)Number of authors 8 Source Title Actinide Research Quarterly - Plutonium Futures - The science 2018, second quarter. - Los Alamos : G.T. Seaborg Institute for Transactinium Science, 2019 Pages s. 1-48 Number of pages 6 s. Action Topical Conference on Plutonium and Actinides 2018 Event date 09.09.2018 - 14.09.2018 VEvent location San Diego Country US - United States Event type WRD Language eng - English Country US - United States Keywords electronic structure ; plutonium ; heat capacity ; Sommerfeld coefficient Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Institutional support FZU-D - RVO:68378271 Annotation The β phase of plutonium metal does not exist at low temperatures, where it transforms to the α phase, therefore its low-temperature heat capacity cannot be determined using direct methods. The β-Pu crystal structure is, however, very similar to that of Pu19Os, which can be cooled close to the 0 K limit. This similarity allowed us to determine the Sommerfeld coefficient of the electronic specific heat for β-Pu. This quantity is of particular importance as it can be used to determine density of states, an essential parameter for predicting material properties. Its record-high value (55 mJ/mol K2) exceeds values for both α- and δ-Pu, with smaller and larger volumes respectively. The non-monotonous behavior of the Sommerfeld coefficient as a function of volume cannot be explained by means of the conventional band theory, which implies that electron-electron correlations play a dominant role in β-Pu.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address https://www.lanl.gov/discover/publications/actinide-research-quarterly/pdfs/arq-second-quarter-2019-single-page.pdf
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