Calculation of temperature dependence of electrical resistivity in the transuranium metals and their alloys

Yu Yu Tsiovkin, M. A. Korotin, A. O. Shorikov, V. I. Anisimov, A. N. Voloshinskii, A. V. Lukoyanov, E. S. Koneva, A. A. Povzner, M. A. Surin

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18 Citations (Scopus)

Abstract

The temperature dependence of electrical resistivity (ER) in fcc transuranium metals-plutonium, americium, and curium and some plutonium-based dilute alloys-has been considered within the Mott two-band conductivity model. It has been shown that the physical origin of the experimentally obtained temperature dependence of ER, including negative temperature coefficient of resistivity (TCR), is an ordinary electron-phonon interaction and its interference with electron-impurity interaction in the case of dilute alloys. A simple criterion of the negative TCR at high temperatures (T> θD) was formulated and applied to explain qualitatively the experimental TCR data in Pu-based dilute alloys. To make numerical evaluation of ER of pure metals and their alloys at high temperature, the coherent potential approach for the Mott two-band conductivity model was combined with ab initio obtained fcc Pu, Am, and Cm densities of states as the starting point in the iteration procedure. The fcc curium LDA+U+SO density of states was reported and discussed in detail. The results of the ER theoretical investigations were compared with available experimental data.

Original languageEnglish
Article number075119
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number7
DOIs
Publication statusPublished - 16 Aug 2007
Externally publishedYes

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