Electronic properties of Pu.sub.19./sub.Os simulating beta-Pu: the strongly correlated Pu phase

0498389 - FZÚ 2019 RIV GB eng J - Článek v odborném periodiku
Havela, L. - Mašková, S. - Kolorenč, Jindřich - Colineau, E. - Griveau, J.C. - Eloirdi, R.
Electronic properties of Pu₁₉Os simulating beta-Pu: the strongly correlated Pu phase.
Journal of Physics-Condensed Matter. Roč. 30, č. 8 (2018), s. 1-7, č. článku 085601. ISSN 0953-8984. E-ISSN 1361-648X
Institucionální podpora: RVO:68378271
Klíčová slova: plutonium * actinides * heat capacity * susceptibility
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.711, rok: 2018

We established the basic electronic properties of Pu19Os, which is a close analogue to β-Pu. Its magnetic susceptibility is 15% higher than for δ-Pu. A specific heat study of Pu19Os shows a soft lattice similar to δ-Pu, leading to a low Debye temperature ΘD = 101 K. The linear electronic coefficient γ related to the quasiparticle density of states at the Fermi level has a higher value than in δ-Pu. The results confirm that β-Pu is probably the most strongly correlated Pu phase, as had been indicated by resistivity measurements. The enhancement of the γ coefficient 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 β-Pu. The volume and related Pu–Pu spacing is clearly not the primary tuning parameter for Pu metal, as the β-Pu density stands close to the ground-state α-phase and is much higher than that for δ-Pu.

Trvalý link: http://hdl.handle.net/11104/0290765