Hydrogen in actinides: electronic and lattice properties

0571606 - FZÚ 2024 RIV US eng J - Journal Article
Havela, L. - Legut, D. - Kolorenč, Jindřich
Hydrogen in actinides: electronic and lattice properties.
Reports on Progress in Physics. Roč. 86, č. 5 (2023), č. článku 056501. ISSN 0034-4885. E-ISSN 1361-6633
R&D Projects: GA ČR(CZ) GA21-09766S
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:68378271
Keywords : uranium * hydride * actinides * magnetism * electronic structure * spectroscopy * heat capacity
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 18.1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1088/1361-6633/acbe50

Hydrides of actinides, their magnetic, electronic, transport, and thermodynamic properties are discussed within a general framework of hydrogen impact on bonding, characterized by volume expansion, and a charge transfer towards hydrogen. These general mechanisms have diverse impact on individual actinides, depending on the degree of localization of their 5f states. Ab-initio computational analyses are corroborated by spectroscopic studies of sputter-deposited thin films, yielding a clean surface and offering a variability of compositions. It is found that valence-band photoelectron spectra cannot be compared directly with the ground-state density of states. Being affected by electron correlations in the excited final states, they rather reflect the atomic multiplets. Similar tendencies can be identified also in hydrides of binary and ternary intermetallic compounds. A new direction is represented by actinide polyhydrides with a potential for high-temperature superconductivity.

Permanent Link: https://hdl.handle.net/11104/0346810